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Diamond Education: How to Choose the Right Diamond Screener?

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Protecting the integrity of your inventory is paramount. Understanding the differences between testing and screening while using the most appropriate instruments for each process will best protect your reputation.

Selecting an Instrument

With lab-grown Diamonds gaining a stronger presence in the marketplace, screeners and testers are no longer optional to include in your operations. They’re essential.

When purchasing a diamond screener or tester, ask yourself the following:

  • What stone specifications (size, color, shape, and loose or mounted) will I be testing?
  • How many stones will I be processing at a time — singles or large quantities?
  • What is my level of expertise with testing?
  • Do I need a portable or stationary instrument?
  • What is my budget?
  • Do I need to test for simulants?

Once you have your answers, you can identify the devices that fit your needs.

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Best Practices

  1. Remember, no single device can do it all — no exceptions.
  2. Understand your tester’s capabilities. Then, choose a device based on the features you need.
  3. Avoid false readings due to improper usage. False readings — such as a Diamond reading as a created Moissanite — may occur by holding your device improperly or testing on a nonconductive material. So, it’s imperative to read your device’s user manual. For added security, practice on known stones.
  4. Keep up with the latest technology. If it’s been years since you last bought a tester, look into newer devices. Each year, testing technology gets better, so older instruments may not have modern testing capabilities.

Diamond Testers

Testing is the process by which Diamonds are definitively identified. These instruments typically separate stones based off their thermal and electrical conductivity, but they have their limits. Learn the limitations of your tester and know when to bring in another device (or send it off to a lab with more advanced equipment). Shop Diamond testers on

Diamond Screeners

Screening is the process by which mined Diamonds are separated from lab-grown Diamonds. Since it’s impossible to identify a Diamond’s growth origin by sight alone, screening equipment is the surest way to determine whether a Diamond is mined or lab-grown.

Furthermore, screening is distinctly different from detection, which involves positive identification of a mined Diamond, lab-grown Diamond, or simulant. Find the right Diamond screener on

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Introducing the DiaTrue Diamond Scanner

The DiaTrue CS and the DiaTrue CXL by OGI Systems are instruments that combine the functionality of multiple machines to ensure maximum security. These machines can detect and identify:

  • Mined Diamonds
  • HPHT lab-grown Diamonds
  • CVD lab-grown Diamonds
  • Created Moissanite
  • Cubic Zirconia
  • CVD-Coated Cubic Zirconia and Moissanite

Both scanners have an embedded 10.9-inch touch screen that displays results in clear, easy-to-read colors. These machines can archive stone data for later use as well as create and print certificates.

The new DiaTrue CXL features a 13×10 cm tray space to accommodate larger parcels, finished goods, watches, and more.

Why do I need a Diamond Screener?

Diamonds enter your store from many sources. Whether buying Diamonds from a dealer or taking in jewelry for repairs and remounts, there are many opportunities for undisclosed stones to enter your stock. You must be absolutely certain of your inventory and take all measures to avoid undisclosed lab-grown Diamonds — because your reputation is at stake.

Luckily, the DiaTrue combines the functionality of multiple machines to ensure total assurance. This device can detect natural Diamonds, CVD and HPHT lab-grown Diamonds, Cubic Zirconia, and Moissanite — all in one scan. Operate with confidence knowing you’ve got the right tool to positively identify lab-grown Diamonds and simulants.

Shop the DiaTrue Diamond Scanner on

Once you choose the right diamond screener, you’ll be on your way to passing peace of mind to customers and securing your reputation as a trusted professional.


Heather Fontenot

Senior Director, Diamonds & Gemstones

Heather joined the Stuller loose stone merchandising team in August 2015 after attaining her bachelor's degree in Business Management from the University of Louisiana at Lafayette. Her natural curiosity and love of all things that sparkle and shine has pushed her to learn as much as she can about Earth's most precious possessions.