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.
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.
Diamond Screening Milestones
2012: Stuller begins screening all Diamonds 1⁄5 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® iD100™ which 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.
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.
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.