GIA Melee Analysis Service Blog Header

GIA Melee Anaylsis Services Celebrates Second Anniversary at Stuller

Congratulations to Stuller on its 2nd anniversary of hosting the GIA melee analysis laboratory service at their Lafayette, LA facility. GIA has evaluated more than 5.9 million melee stones for Stuller through this service, giving greater confidence to their customers and – ultimately – to jewelry consumers.

“We are proud to have collaborated with Stuller for the past two years, bringing this fully automated service to their operation site while maintaining the independent, objective analysis the industry and consumers count on,” said Thomas M. Moses, GIA executive vice president of laboratory and research.

Separating natural diamonds from laboratory-grown gemstones and simulants provides the quality products that Stuller clients have come to expect while furthering GIA’s mission to protect consumers.


Check out the video below for more on the GIA laboratory:

Check out our 2018 blog post about the opening of the GIA Melee Analysis Laboratory here.  

2020 GRAMMY Awards Roundup: Jewelry Trends

Did you catch the 2020 GRAMMY Awards last night? Most importantly, did you spot all the bling the celebs were sporting?! Spoiler alert: the jewels were HOT!


2020 marked the 62nd Annual GRAMMY Awards show, which aired last night, January 26. The lovely Alicia Keys graciously hosted the GRAMMYs for the second consecutive year. However, hours before the show began, the public received word that beloved basketball legend Kobe Bryant, his daughter Gianna, and seven others were killed in a helicopter crash. Many celebrities used the event as a platform to honor Bryant.

On a lighter note, we saw a lot of modern fashion looks, as well as a lot of simplicity. GRAMMYs jewelry was a mix of stunning and simple — a trend we may expect to see throughout 2020. A lot of celebs chose the “less is more” route, while others were decked head-to-toe in jewels.


Here are the hottest 2020 GRAMMY jewelry trends—

Dazzling Diamonds

We saw a lot of diamond fashion last night. Tyler, the Creator kept it classic in diamond studs, while Lizzo showed off an elegant diamond necklace stack. Luckily, these diamond trends are timeless, and can be easily replicated using classic diamond styles.






On the contrary to these classic pieces, Camila Cabello and Billy Porter decided to let their diamonds shine bright with chunky chokers! Rock this trend by layering multiple diamond necklaces.



Pretty in Pearls

There were quite a bit of celebrities that rocked pearls last night. Gwen Stefani displayed a beautiful, simplistic pair of diamond and pearl earrings. Stay on-trend by keeping a pair of accented pearl earrings in your jewelry box.





We saw beauty influencer Nikita Dragun and model Shaun Ross adorned in pearls last night from head-to-toe. Let me just say that I am OBSESSED with this look! While we may not be rocking pearl outfits every day, we can support the pearl trend with an interesting necklace or a more timeless staple.






Gorgeous Gemstones


Shawn Mendes, FKA Twigs, and Tess Holliday were seen showcasing some colorful gemstone fashion! Shawn wears a delicate diamond and emerald necklace, FKA Twigs flaunts a diamond-accented opal necklace, and Tess boasts some statement ruby earrings. Follow this 2020 trend easily by incorporating more color into your jewelry collection.






Honorable Mention

We saw some minimal yellow gold styles last night, one of my favorites being singer/songwriter Brittany Howard (she’s my celebrity idol, so naturally I had to add her on here). Amp up your looks by including dainty yellow gold bands or chic earrings!





What were your favorite 2020 GRAMMY jewelry trends? Let us know in the comments below!

Photos from

Lab-Grown Diamonds Blog Header

Diamond Education: How Does Stuller Uphold Its Diamond Screening Promise?

How many undisclosed Lab-Grown Diamonds are you willing to sell? For Stuller, the answer is zero. That’s why we screen 100% of all colorless and near-colorless diamonds that pass through our hands. We uphold our diamond screening promise to protect you, the independent jeweler, your customers, and the industry. It is a question of integrity. It’s also a requirement of the FTC Guides for the Jewelry Industry.

How does Stuller uphold its Diamond screening promise?


Many years ago, when Stuller began screening for undisclosed lab-grown Diamonds, we took several important steps. We reviewed every way a Diamond entered our building and evaluated the risk levels based on the probability of contamination associated with each supply. This helps everyone down the pipeline to understand risk levels associated with each avenue into Stuller.

From there, we developed new processes or modified existing procedures to ensure that we screen all Diamonds arriving at Stuller. In short, we leave no Diamond unturned or unscreened.

Diamond Screening Promise Gem Lab

Our Diamond Screening Promise

As a major supplier, we are in a position to protect our supply chain, your reputation, and your customer’s confidence. We gladly accept this responsibility by maintaining:

  • A zero-tolerance policy for Undisclosed Lab-Grown Diamonds that places stringent testing requirements on all of our suppliers.
  • The Stuller Gem Lab, an advanced diamond screening lab managed by a full-time Graduate Gemologist.
  • A strategic services arrangement with GIA® to screen and color grade all round melee sizes 0.005 CT through 0.24 CT.
  • The ability to screen all shapes and sizes of colorless and near-colorless melee (D to N) as well as set jewelry.
Lab-Grown Diamonds Social Share

Diamond Screening Milestones

2012: Stuller begins screening all Diamonds 15 carat and larger for ULGDs using an early screening machine.

2014: Stuller acquired the sophisticated Automated Melee Screening Device (AMS) from DeBeers’ IIDGR division. It screens round Diamonds 1.4mm and larger providing an effective and efficient way to test melee.

2016: Stuller added IIDGR’s (DeBeers) PhosView, which allowed us to screen all shapes that are High-Pressure High-Temperature (HPHT) grown.

2017: Stuller added the AMS2 (the second generation of the original AMS) to our Diamond screening process. This technology screens round and fancy shapes, as small as 0.85mm detecting both HPHT and CVD grown Diamonds, screening 10 times faster (3,600 stones per hour) than the original AMS (which we continue to use).

Stuller added the GIA® iD100which combines advanced spectroscopic technology to identify natural Diamonds giving results in two seconds.

2018: Stuller added the J-Smart Plus to batch screen all Diamond-set products. Stuller also added the DiaTrue CS (by OGI) to screen set rings and parcels of stones.

Diamond Screening Promise Gem Lab

Stuller Gem Lab

Stuller Gem Lab uses the latest advanced technologies available to separate natural Diamonds from their lab-grown counterparts. These two supplies are kept totally separate from one another. Their paths never cross to ensure complete confidence. All lab-grown melee Diamonds are kept in a separate room within the facility, and their containers are clearly labeled.

To stay at the forefront of Diamond screening, we continuously invest in the latest technology. The Stuller Gem Lab has a multi-tier screening process managed by a full-time graduate gemologist. All colorless and near-colorless Diamonds and Diamond jewelry entering our facility are screened on an array of technologies depending on shape and size. Referrals from these screening technologies receive a final determination from our gemologist who performs further screening or is sent to a GIA® Advanced Lab.

Diamond Screening Promise Gem Lab

GIA® Melee Analysis

In addition to all of these internal controls, Stuller has established a strategic service arrangement with GIA (Gemological Institute of America®) by offering GIA’s Melee Analysis Service inside our global headquarters in Lafayette, Louisiana. All round melee from sizes 0.005 CT through 0.24 CT are screened on-site by GIA staff independently operating the GIA-owned analytical instrumentation in a dedicated, secure space.

This results from a strong continuous collaboration between Stuller and GIA leadership. GIA is the most trusted gemological authority in the industry. Therefore, there is no one better than GIA for Stuller to rely on to deliver on our commitment to correctly represent the product we are selling.

Learn more about Stuller’s extensive diamond screening promise here on

Lab-Grown Diamonds Blog Header

Diamond Education: How are Lab-Grown Diamonds Created?

Lab-grown diamonds are an increasingly popular, attractively priced center stone option. In the past few years, we’ve seen a growing trend among consumers toward interest and acceptance of lab-grown diamonds.

In July 2019, MVI Marketing asked 1,154 millennial consumers aged 21–36 if they’d consider a lab-grown diamond for the center stone of their engagement ring. A whopping 67% said yes — and 21% said maybe.

Remember, your knowledge gives you the opportunity to build trust.

Read on to learn about the differences between natural and lab-grown diamonds as well as how lab-grown diamonds are created.

Lab-Grown Diamonds Pink Yellow

Diamonds Types

Natural diamonds built the industry, and you can say they’re pretty timeless: they formed 1.0 to 3.5 billion years ago. Their age and their unrivaled cultural symbolism — “a diamond is forever” — support their long-standing appeal.

Based on their impurities, all diamonds are divided into two types:

Type I Diamonds

Type I diamonds contain nitrogen and account for 98% of natural diamonds. According to the cluster arrangement of those nitrogen atoms, this category is further subdivided into two types: Type 1a and Type 1b.

  • Type 1a diamonds are plentiful, and their color varies from near-colorless to light yellow.
  • Type 1b diamonds are rare and typically strong yellow in color.

Type II Diamonds

Type II diamonds have no measurable level of nitrogen and account for only 2% of natural diamonds. Then, they are further subdivided. If containing boron, diamonds are Type IIb. If not, they are Type IIa.

  • Type IIa diamonds have no measurable levels of nitrogen or boron. They are usually colorless but also come in shades of light brown. Many of the world’s historical diamonds — like the Cullinan and the Koh-i-Noor — are type IIa.
  • Type IIb diamonds — unlike all other types — conduct electricity and exhibit beautiful blue or blue-gray shades due to the presence of boron. The Hope Diamond is the most famous type IIb diamond. *NOTE: Some IIb diamonds with trace amounts of boron remain colorless, yet still conduct electricity. Likewise, Moissanite is electrically conductive. Because of this, probe-type testers measuring for conductivity may falsely call out type IIb diamonds as Moissanite.

That’s quite a range for diamonds to fall into, but what about lab-grown diamonds? As it turns out, they play by slightly different rules — solely thanks to the method in which they’re grown.

Lab-Grown Diamonds Social Share

Lab-Grown Diamonds

Lab-grown diamonds exhibit the same optical, physical, and chemical properties as natural diamonds. Unlike natural diamonds, which can be either type I or type II, all colorless lab-grown diamonds are type II.

While it is nearly impossible to detect lab-grown diamonds by sight, the growing process leaves behind evidence of any diamond’s origin. Advanced screening and testing equipment is necessary here. (Just remember — no single device can do it all.)

So, How Are Lab-Grown Diamonds Created?

Lab-Grown Diamond Shot Serial NumberLab-grown diamonds got their start in the ‘50s with General Electric — yes, the power company. Although General Electric (specifically, H. Tracy Hall, but that’s a story for another day) pioneered lab-grown diamonds, they grew these diamonds through just one process. Today, there are two.

We’ll start with the first.

Chemical Vapor Deposition (CVD)

The CVD process was invented first— in 1952 by William Eversole at Union Carbide. This process allows diamonds to grow in an entirely different way than the HPHT process. CVD starts with a natural diamond slice (or seed) placed in a chamber and exposed to less extreme temperatures (approximately 1,200–3,000 degrees Fahrenheit) and lower pressure (100 – 550 PSI).

Recent advancements have made this growth process more advantageous. Methane and hydrogen gas are injected into the chamber and combined with high heat. The electrons separate, forming plasma gas. The freed carbon then rains down on the seed, growing new diamond crystals. Typically, this process produces brown or gray diamonds, which are turned colorless through an HPHT annealing process. This process takes several days to a few weeks.

High-Pressure High-Temperature (HPHT)

The HPHT process grows diamonds using diamond presses, machines that mimic the extreme conditions that form diamonds within Earth’s upper mantle: intense pressure (725,000 – 870,000 PSI) and intense heat (2,300–2,900 degrees Fahrenheit). In this process, diamond source powder dissolves in molten metal flux and deposits on diamond seed crystals.

This process dates back to 1954. By the 1970s, General Electric started commercially producing “gem-quality” HPHT lab-grown diamonds. In the following years, General Electric and other companies grew larger sizes of non-gem-quality diamonds strictly for industrial use. Since then, HPHT technology has come a long way, now growing lab-grown diamonds for use in jewelry. This process takes several days to a few weeks.

Learn more about Lab-Grown Diamonds at

Famous Pearls Blog Header

Sell With a Story: How are Pearls Formed?

How are pearls formed? Discover pearl’s allure perfect for June and far beyond—


To limit pearls to June birthdays would be a lot like limiting water to streams and ponds. Pearl beauty, appeal, and style — whether freshwater or saltwater — finds its way into almost every woman’s wardrobe. And thanks to cultured pearls, developed in the early 20th century, most women can afford them.

Pearl Personalities

Like most other gemstones, pearls don’t fit neatly into one particular category. Their subtle, luxurious beauty boasts multiple personalities to suit the many customers who choose them.

How are Pearls Formed Beauty Shot Pearl Strand
  • Pearls are feminine, fun and flirty, a personality typified by trending pearl fashion jewelry. Think of Sarah Jessica Parker’s style in Sex in the City.
  • Pearls are classic simplicity — the strand and studs worn by any woman who appreciates an understated look. Think of Jacqueline Kennedy Onassis.
  • Pearls are sophisticated — a long, lush strand of fine large pearls looped around the neck or a multi-strand necklace perhaps clustered or twisted, with or without a diamond or gemstone adornment. Think Audrey Hepburn in Breakfast At Tiffany’s.
  • And last but not least, pearls are extravagant and spectacular. Try one-of-a-kind designer styles accented and interwoven with diamonds and gemstones. Think of Rihanna draped in strands of pearls or Elizabeth Taylor wearing La Peregrina.

A Moment in Time

Imagine that moment millennia ago when mankind first encountered a small wondrously luminescent object. Was it round, oval, teardrop or baroque? It had no name, only its shape, color, and dazzling luster. Was it a stone? It didn’t look like one. It appeared almost alive. Yes, it was beautiful and unusual; surely it had some greater purpose.

We can surmise that since that moment, pearls have fascinated us. One pearl carbon dated to 5,500 BCE — more than 7,500 years ago — was buried with its owner. In all likelihood, older ones exist and sooner or later someone will find them.

How are Pearls Formed Valentines Day Jewelry Trends Classic Pearls

So, How are Pearls Formed?

The story of pearl formation sounds much like a fairytale in which the heroine is perceived as a threat and shut away from the world with no obvious possibility of redemption. So, how are pearls formed? Here’s how the tale unfolds.

Each pearl begins when an irritant somehow enters an oyster or other bi-valve mollusks. On perceiving the threat, the mollusk reacts to protect its soft inner tissue. It encapsulates the irritant with successive translucent layers of nacre, smoothing its surface so oyster and irritant can coexist. As far as the oyster knows, the irritant will be there permanently.

Then miraculously, someone opens the mollusk to find a treasure of great beauty. The once disdained “irritant” emerges as a pearl and enters a world of love and appreciation to live happily ever after. The end.

I don’t think so.

We can’t just leave this story for pearls. Let’s apply it to our lives too. After all, don’t our biggest challenges and ”irritants” develop our greatest strengths and bring inner beauty to light?

Pearls in History

With so many pearls available today, it’s hard for us to understand the rarity of natural pearls, particularly those of any size. They are so rare that for millennia they were the most coveted gems. To have one was to possess beauty of incomparable value. Only royalty and other wealthy individuals had any hope of ever owning pearls.

The Hope Pearl

The most famous natural saltwater pearl weighs 1,800 grains — 450 carats — or 4-ounces. It once belonged to the owner of the Hope Diamond. Currently, it is in the British Museum of Natural History.

La Peregrina

This one is a perfectly pear-shaped pearl weighing 223.8 grains (55.95 carats). Its famous owners included Prince Phillip II of Spain, Joseph Bonaparte — who stole it from Spain, British Marquis of Abercorn, and finally in 1969, Elizabeth Taylor, gifted to her by Richard Burton.

The Mary Tudor Pearl

Now known as the Pearl of Kuwait, it is often confused with La Peregrina. They are both pear-shaped. The Mary Tudor Pearl weighs 258.12 grains or 64.5 carats. It was owned by Isabella of Portugal; her daughter Joanna of Austria; Joanna’s cousin, Phillip II of Spain; and Mary Tudor of England.

Alive With Beauty

Living organisms — bi-valve mollusks — create pearls. As such, they have a presence, a vitality that attracts the eye with mesmerizing beauty. Their luster emanates from within, giving them a spiritual allure.

Some historians have proposed that pearls were first used and sought after for their spiritual powers and only secondarily for their value. Perhaps they were, but frankly, I find that hard to believe. When something combines rarity with beauty, it’s valuable no matter what the use.

Pearl Power

Both ancient India and China gave rise to astounding pearl myths of their origins and powers. Vedic texts relate that pearls were born of Earth’s water and Heaven’s powers, each fertilized by a lightning strike. Pearls were considered “daughters of the Moon,” reflecting her luster.

In today’s youth-oriented culture, we would all do well to buy pearls and lots of them. In 17th and 18th century BCE, the Babylonians believed that pearls had life-giving qualities including the ability to restore youth.

To Look Their Best

What do pearls have to do to stay beautiful? They need to be worn often. If stored in a hot, airless environment, they can dry and crack. Pearls need oil from the skin to enhance their luster and color and after each wearing, they should be wiped with a damp cloth to remove hairspray or other damaging chemicals.

How are Pearls Formed Classic Pearls JCK trends

Still can’t get enough pearls? Check out our Pearl Center on for detailed info on everything you wanted to know about pearls. And don’t forget to share these stories with your customers. The more storytelling you can share with them, the better!

Emerald Gemstones Sell Story Header

Sell With a Story: Emerald Gemstones

Let’s go back to the Emerald City of Oz and forget about clicking the heels of our ruby slippers. Let’s click our emerald slippers instead as we enter the realm of emerald beauty. This irresistible force has long exerted a powerful attraction on the rich and famous, from the rulers of ancient India to today’s A-List celebrities on the red carpet.

Of all emerald devotees, Cleopatra is probably the most famous. Her passion led her far beyond jewelry. She wore emerald encrusted robes — a luxury by any standard. And she gave loose emeralds as gifts to visiting dignitaries, all of them men. They, too, appreciated the beauty of emerald gemstones.

Did You Know?

Emerald gemstones were sold 6,000 years ago — circa 4000 BCE — in Babylonian markets. Where were they from? We don’t know. But between 1000 and 3000 BCE, one of the earliest emerald occurrences was discovered in Upper Egypt near the Red Sea. This later became known as “Cleopatra’s Mine.”

Good Luck Jewelry Emerald Social Share

Shop emerald jewelry on

“The Green of Growing Things”

The name emerald comes to us from the Greek word, smaragdos. The origin of smaragdos could be either the Hebrew word izmargad or the Sanskrit word marakata, meaning “the green of growing things” — fresh, vivid, radiant.

I like the Sanskrit version. It communicates the lush range of emerald hues from a yellow-green to a deeper blue-green. Think of the first leaves of spring and follow this verdant trail to the richer shade of spruce green. Along the way, you embrace a world of growth that reflects emerald gemstones and their mesmerizing power.

Kermit Was Wrong — Way Wrong!

Kermit the Frog famously sang “It’s not easy being green.” But when you’re admiring emerald gemstones, you realize he had it all wrong. In addition to their famous beauty, extraordinary powers have been attributed to emeralds through the ages. Read these and you’ll realize that all of your customers need to have emerald jewelry. The more the better!

  • In 4th century BCE, the Greek philosopher Aristotle wrote that emerald gemstones increase its owner’s importance in presence and speech during business transactions, gives victory in trials, and prevents epilepsy.
  • Throughout history, many cultures believed emerald enhanced fertility and fidelity: not a bad combination.

By the Middle Ages, emerald’s powers had increased.

  • Emerald could keep a woman chaste — but not a man!
  • They could reveal truth and falsehood.
  • They acted as an antidote to spells, enchantments, and demons.
  • Emeralds could foretell the future if worn on the left side — but not the right.
  • They made people more intelligent and honest.
  • A high-quality emerald would change hues to alert its wearer of danger.

The Irish have always had a special relationship to emerald, too. After all, Ireland is often called the Emerald Isle. And what did the Irish believe? (Full disclosure: I’m half Irish). They believed Emerald bestowed good luck and perhaps a pot of gold at the end of the rainbow.

Famous Emeralds Over Time Social Share

One of Our Emerald Stories

We keep our Stuller Gemstones™ inventory well stocked with emerald gemstones in all shapes and sizes you need. But every now and then, a customer has an unusual request. So our Special Order experts go to work.

Some time ago, we were asked to find a 7.33ct emerald. No big deal? Wrong. Because the customer wanted it un-oiled. As you know, pressurized oiling of emerald is universal as a way to make standard surface fissures less visible.

The only way to find an emerald that isn’t oiled is to find a very high-quality emerald with no surface fractures. If the color is equal to the quality, the price is astronomical. This one was $25,000 per carat.

So if one of your customers requests an un-oiled emerald or any shape, size, and quality not in our inventory, trust our Special Order experts to find it for you.

Learn more about our Special Order Services on

The World’s Largest Emeralds

  • 7,052-carat uncut emerald crystal from Columbia, privately owned
  • 2,205-carat carved emerald vase in the Viennese Treasury, Austria
  • Claimed world’s largest carved emerald, a 1,558-carat emerald named “1492” displayed in the Carnegie Museum of Natural History in Pittsburg
  • 1,965-carat uncut Russian emerald displayed at the Los Angeles Museum of Natural History
  • 1,862-carat uncut, un-named emerald from Hiddenite, N.C. privately owned
  • 1,796-carat emerald crystal store in the Banco Nationale de la Republica, Columbia (the largest of five un-named emeralds there)
  • 1,759-carat Guinness Emerald Crystal also in the Banco Nationale de la Republica, Columbia

By comparison to these, the world’s most famous emerald — the 1,383.95-carat uncut Duke of Devonshire — seems relatively modest. It was mined in Columbia and is now in the British Museum of Natural History.

Good Luck Jewelry Emeralds

Shop emerald gemstones on

Have a favorite story about emerald gemstones? Share it with us by leaving a comment below!

SWAS Diamond History Blog Header

Sell With A Story: Diamond History

Diamonds remain one of the most fascinating and dynamic substances on Earth. Their unique molecular structure makes the hardest materials known to man. And when polished, of course, their brilliance is beyond compare.


Here’s a bit of diamond history to help you sell with a story.

Meet “Lucy”

To help customers understand the heat and pressure required to create a diamond, consider “Lucy,” a white dwarf star only 5.87 trillion miles, or 50 light years, from Earth. That may seem like a great distance, but in terms of the universe, Lucy is actually quite close. After all, she’s in our galaxy.

Discovered in 2004, astronomers playfully named her after the Beatles song “Lucy in the Sky with Diamonds,” and you have to admit that “Lucy” is easier to remember than BPM 37093— her technical tag.

Diamond History Star in Space

So what is Lucy? She began as a blazing star like our sun with a core temperature of approximately 27,000,000°F. She couldn’t stop shining and over billions of years, she burned herself out. The result? She’s 5 million-trillion-trillion pounds of pure crystallized carbon or, from a jeweler’s perspective, a 10 billion-trillion-trillion carat diamond. Lucy is a cosmic diamond, and for now, at least, the largest in our galaxy.

  • Astrophysicists say it would take a loupe the size of the sun to grade Lucy.
  • These days, her surface temperature is only 12,000°F.

Lucy’s Earthly Counterparts

Earth’s diamonds are smaller — just a little — but their formation still requires several billion years of intense heat and pressure. This is only available 100 miles below Earth’s surface. There, the carbon molecules bond equally in all directions to create the hardest substance on Earth.

This is all very impressive, but that’s not why we love them. We love them for their sheer beauty, extraordinary clarity, and for their fire embodying those vast years of heat and pressure. We love them because they sparkle and astonish.

2018 diamond outlook 3 stone engagement

April’s Birthstone

You could say that those with April birthdays hit the jackpot. The allure and mystique of diamond history casts a legendary spell.

According to lore, diamond imparts balance, clarity (naturally), and abundance. It increases inner strength, provides the wearer with better relationships, and did we mention it symbolizes eternal love?

More Diamond History

Today, diamonds are mined in Botswana, Angola, South Africa, Russia, Australia, Indonesia, Canada, and the United States. But where did they first see the light of day?

We can’t be certain, but the first historical mention of diamonds occurs in a Sanskrit text from 4th century BCE India. Diamonds had been found along the rivers and streams of ancient central India perhaps 5,000 years ago.

They were called “Hirakamani,” “Heera/Hira” and “Vajramani,” names that ranged in meaning from “King of Gems” and “Thunderbolt Lightning” to “indestructible.” Clearly, the Indian people had the right idea and wasted no time making the most of their discovery.

The 4th century BCE documents record diamond trading, taxes, classification, and diamond experts. They knew the value of this beautiful stone and respected the need for expertise in selecting the finest.

Fast forward 1,700 years to 14th century Venice. It was here that gemstone cutters began to develop the art of diamond cutting and their value soared.

Zale's Tales Diamond Tweezers

Storied Stones: The Sancy Diamond

Stolen from India in the 14th century, this 100-carat pale yellow diamond passed back and forth among Europe’s royalty for centuries. It was owned by Charles the Bold, Phillip II of Spain, the King of Portugal, and many more.

At one point, Elizabeth I owned it and secretly pawned the diamond to finance a Dutch war against Spain. Nicolas Harlay de Sancy acquired the diamond. Elizabeth I wanted to buy it back but failed, and it was only when Sancy went bankrupt that he sold the diamond to James I, Elizabeth’s heir to the throne. The diamond was pawned multiple times, disappearing at one point for 25 years. Somewhere along its lengthy path, the Sancy was re-cut to 55.232 carats. Eventually the wealthy American, William Astor bought it and it 1976 his family sold it to the Louvre.

The Sancy Diamond Worthy

The Sancy Diamond • Image Courtesy of Reuters

Stuller Diamonds

Stuller offers a full range of diamonds to fill virtually any need you can anticipate. With certified Stuller Diamonds™, you can provide your customers with the assurance they need for what might be one of the most important purchases of their lives. Each serialized stone comes with a grading report that offers peace of mind. Need something smaller? Our melee diamonds will fit the bill. And since Stuller uses an independent GIA® lab, you know that what you’re getting from Stuller is the real deal.

Diamond History Loose Stones

Shop Stuller Diamonds™ on

Don’t see what you need? Call our diamond sales team today at 1-800-877-7777, extension 540.

GIA Melee Analysis Service Blog Header

Stuller Has Just Screened Its 1,000,000th Diamond!

Earlier this year, Stuller opened its doors to an on-site, independently-operated GIA Melee Analysis Service. Since April, GIA has screened round, D-to-Z color melee from 0.9mm to 4.0mm parcels coming through the building— scanning 1,800 to 2,000 stones per hour! Well, guess what?


We’ve Just Screened our MILLIONTH Diamond!

That’s right, more than 1,000,000 diamonds have passed through the GIA Melee Analysis Service at Stuller’s global headquarters in Lafayette, LA.

GIA Melee Analysis Service Diamonds

Why does this matter?

We brought the GIA Melee Analysis Service to Stuller headquarters to make certain that every diamond we sell is correctly represented. By partnering with GIA, we’re ensuring the most precise screening processes in the industry. After all, with over 60 years of synthetic diamond research, GIA is the foremost authority on diamond screening and authenticity.

Our industry-leading efforts promise to leave no stone unturned. With lab-grown diamonds moving into the marketplace, it’s more important now than ever to preserve the integrity of our inventory. With help from the GIA Melee Analysis Service, we confidently stand behind every stone we sell. And in turn, you can pass that confidence and trust on to your customers.

What can you do?

Begin by fully understanding the differences between natural and lab-grown diamonds. First off, lab-grown diamonds are not simulants— they have the same chemical composition and crystal structure as naturally mined diamonds. Secondly, there are two processes used to create lab-grown diamonds, High-Pressure High-Temperature (HPHT) method, and Chemical Vapor Deposition (CVD) method.

As a jewelry professional, it is important to make sure that you are able to give your customers peace of mind. In order to do that, it’s important that you equip yourself with the right tools. To get started, here are a few suggested questions to ask yourself to help you decide the instrument that is best for you:

1. Will you be screening loose diamonds, mounted jewelry, or both?

2. What size diamonds will you be screening?

3. Are you screening center stones or melee? What shapes will you be screening?

4. Do you want the instrument to be manual or automated?

GIA Melee Analysis Service Diamond Testers

Remember, no single instrument can do it all

Once you’ve answered these questions, it’s time to start your research. Here’s a link to Stuller’s website that features different types of screening equipment for both diamonds and gemstones. Remember, no one instrument screens for everything, which is why it’s very important to read the details for each piece of equipment before purchasing. And if you think these instruments are expensive, consider the cost of unintentionally selling a lab-grown diamond as a natural diamond and ask yourself this question: What is my reputation worth?

Shop Diamond Screeners on

Here is a handy comparison of natural vs. lab-grown diamonds—


GIA Melee Analysis Service Blog Header

Stuller Welcomes On-site GIA Melee Analysis Service

GIA (Gemological Institute of America®) brought its gemological expertise right here inside Stuller’s facilities in Lafayette, Louisiana. Thanks to a pioneering strategic service arrangement, Stuller will begin offering melee screened by the GIA Melee Analysis Service for diamond parcels coming through the building. GIA staff will screen melee on-site as they independently operate the GIA-owned system in a dedicated, secure space.

Why GIA Melee Analysis Service?

“GIA® is the most trusted gemological authority in the industry,” reports Stanley Zale, vice president of diamonds and gemstones procurement. “Therefore there is no one better than GIA for Stuller to rely on to deliver on our commitment to represent the product we are selling correctly.”

Launched in December 2016, the GIA Melee Analysis Service applies GIA’s decades of research into natural, treated and synthetic diamonds. Their advanced system quickly and accurately separates natural diamonds from simulants, synthetics, and HPHT treated natural diamonds. And while their technology screens, it sorts and color grades (D-to-Z) natural diamonds. GIA Melee Analysis Service will test all Stuller round melee in sizes 0.9mm to 4.0mm.

On Monday, April 16, Stuller officially commenced using the GIA Melee Analysis Service with a ceremonial ribbon cutting with Thomas M. Moses, GIA executive vice president and chief laboratory and research officer, and Stuller president Danny Clark. See below.

GIA Melee Analysis Service Ribbon Cutting

What this means for your business

Now more than ever, diamond and gemstone authenticity is of great concern in this fast-changing industry. So, to address the ever-present issue of lab-grown/synthetic and treated diamonds mixed into melee parcels, Stuller will employ GIA’s automated service to analyze and sort our melee diamonds quickly and accurately. The service can screen 1,800 to 2,000 stones per hour, enabling Stuller to deliver diamonds promptly while ensuring integrity.

“Locating our service within Stuller’s premises allows GIA to rapidly and efficiently analyze a higher volume of melee diamonds, helping to protect the consumer and ensure their confidence in the most prevalent stones in the market,” said Thomas M. Moses, GIA executive vice president of laboratory and research.

GIA’s mission to serve the public brings end-consumers the quality and assurance they’re due. And by working with GIA, Stuller mirrors those values to deliver diamonds with integrity and certitude we can stand behind.

GIA Melee Analysis Service

Shop Melee on


Gem Cam Blog Header

The Complete Guide to Operating Your New GemCam

We know that sometimes selling loose diamonds and gemstones can be challenging for jewelers. After all, customers aren’t quite as adept at viewing stones through a loupe. The new GemCam™ Imaging System is sure to aid gemstone buyers on the road, master jewelers in their store, hobbyists, and everyone in between.

Stuller is proud to distribute the new and innovative GemCam technology. Use the tool itself in tandem with GemCam’s smartphone app to take high definition, 360-degree photos, and videos for easy viewing.

GemCam Features Include:

  • Lightweight, portable device with durable carrying case
  • Long-lasting rechargeable battery
  • Zoom capability up to 40x – similar to microscope quality for clear inclusion identification
  • Built-in LED white lights: up lights and overhead
  • Built-in image cropping tools
  • Gem gripping from 2mm – 16mm
  • * Smartphone/tablet is not included

Tool Applications:

View Stones in Person with Customers – Not everyone can use a loupe as well as a master jeweler. Use the GemCam to view stones alongside your customers, allowing customers to become the expert by empowering them to choose their perfect stone.

Showcase the Stone Online – Use the closeup gem images to share on your social media, website, and email to customers in order to showcase your inventory and boost business.

Diamond/Gemstone Dealer – This portable tool works great on the road, too. Take it with you on gemstone buying excursions to thoroughly examine prospective stones.

Great for Appraisals – Use the device to aid in your diamond and gemstone appraisals.


Watch this product overview to familiarize yourself with the GemCam hardware

DGemCam App ownload the GemCam App

Using your smartphone, simply locate the GemCam App in the App Store or Google Play. Look for the icon pictured here. After a quick download, you’re ready to use the app!

Using the GemCam App


When taking a picture of a diamond or gemstone, you must first place your stone in the cassette. Once the stone is in place, adjust your lighting and set magnification.

GemCam App Screenshot

Open GemCam App

GemCam App Screenshot

Select > Photo

GemCam App GIF

Adjust Stone Accordingly


You’re allowed a few in-app options after you snap your gemstone photo, enabling you to zoom in/out, crop to suggested proportions, and rotate the image. Once you are done, always click the save image button. This will add the photo to your device’s image gallery. Then, you can export the image via text, email, add to Google Drive, iCould Photo Sharing, or post straight to Facebook, Twitter, or Instagram! What’s more is that if your phone is connected to a wireless printer, you can print your gemstone images straight from your device!

GemCam App Screenshot

Zoom in • Zoom out

GemCam App Screenshot

Set Image Proportions

GemCam App Screenshot

Share Photo


All gemstone and diamond photos can be logged into your Library. Click the Diamond icon, then you can categorize stones saved to your device’s photo gallery. Click select from gallery and choose the stone you’d like to categorize.

GemCam App Screenshot

Select > Diamond

GemCam App Screenshot

Choose Diamond Image

GemCam App Screenshot

Take Photo or Select From Gallery

You can add multiple images and even 360-degree video to each stone entry. Then, the app prompts you to add the following stone criteria: Shape, Carat, Cut, Clarity, Color, Lab, Lab ID, Stock (for your internal inventory records), and Text. Once you click Upload Diamond, you’ll automatically receive an email with a link to your diamond photo. This link is easily shared with your customer in real time. You’re also given the option to upload the diamond to RapNet – an online trading network run by Martin Rapaport’s company, the foremost authority on diamond trading.

GemCam App Screenshot

Choose Image From Gallery

GemCam App Screenshot

Input Diamond Specs

GemCam App Screenshot

RapNet Prompt


Upon receiving your GemCam from Stuller, you must set up your FREE account on All categorized diamonds will be housed on GemCam’s virtual platform at – think of it as a cloud to store your diamond inventory. This means you can access your diamonds from any internet-connected device through Each stone entry is listed with its respective details you first manually inputted. Then, from the website, you can share via email, create a shareable link that can be posted on your website or social media account, or share with the WhatsApp messaging platform.

GemCam App Screenshot

Select > Library

GemCam App Screenshot

Login to Library


Does the GemCam come with a phone or a tablet?

No, that’s something you will have to come up with on your own.


Which platforms support the GemCam app?

The free app is available on the Apple App Store and also through Google Play.


Is the tool/app difficult to use?

Not at all! The tool is simple and the app is extremely intuitive. There’s not a huge learning curve when operating the software on your phone or tablet.


How does this device work for colored gems?

This device works wonderfully for colored gems! The LED lighting is perfect for colored gemstone viewing.


Can you stop the rotation of the gem to study specific areas of it?

Yes! You can also stop the rotation using the manual spin button.


Does this tool work with all stones shapes and sizes?

It can accommodate fancy shaped stones 2mm-16mm in size.


Can you rotate the gem slower than shown in the video?

You can use the manual button to rotate and stop when you want. You can also purchase the replacement manual cassette to rotate the stone by hand.


Does this tool only take photos of loose stones or can you take photos of mounted stones as well?

Loose stones only.


Does this tool work with the iPhone 8 Plus? It has two camera lenses.

It does! The primary lens on the phone’s left side is the one you will use.

For more answers about GemCam, visit or call our Tools Tech team at 800-877-7777 ext. 4300.

The GemCam imaging tool used in conjunction with the app and Internet platform will transform the way you sell and promote your gemstones. So what are you waiting for? Purchase your GemCam Imaging System today!