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Diamond Screeners and Testers

Screening vs. Testing

Protecting the integrity of your inventory is paramount. Understanding the differences between testing and screening while using the topmost instruments for each process will best protect your reputation. View Stuller's Diamond screening policies.

What is Screening?

DiaTrue Diamond Screener

Screening is the process by which natural 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 natural or lab-grown. Furthermore, screening is distinctly different from detection (or testing), which involves positive identification of a diamond, lab-grown diamond, or simulant.

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What is Testing?

Diamond Testers

Testing is the process by which diamonds are definitively separated from created Moissanite and other simulants.Testing instruments typically separate stones based off of their thermal and electrical conductivity, but they have 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).

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Compare testers

  • Item
  • Stones identified
  • Test time
  • Smallest size detected
  • Price
  • Adamas by Presidium®
  • Moissanite
    Diamonds
    Simulants
  • 2 seconds
  • 0.02ct
  • Presidium® Multi Tester III
  • Moissanite
    Cubic
    Zirconia
    Diamonds
    Simulants
  • 2 seconds
  • 0.02ct
  • SAM by Presidium® Diamond and Moissanite Tester
  • Moissanite
    Diamonds
    Simulants
  • 2 seconds
  • 0.01ct
  • Presidium® Gem Indicator
  • Gemstones
  • 1 second
  • presidium syntheticPresidium® Diamond Mate Tester Kit
  • Diamonds
    Polished and Unpolished Gemstones
  • 3 seconds
  • 0.02ct
  •  GemOro® Superior Instruments Testerossa Tester
  • Diamonds
    Moissanite
  • 3 seconds
  • 0.02ct
  • gemoroGemOro® Superior Instruments UltraTester 3+
  • Diamonds
    Moissanite
    Cubic Zirconia
  • 3 secpmds
  • 0.02ct
  • gemoro PRO-DGemOro® Superior Instruments PRO-D III Tester
  • Diamond
    Sapphire
  • 3 seconds
  • 0.02ct
  • presidium syntheticGemOro® Superior Instruments PRO-M III
  • Diamonds
    Moissanite
  • 3 seconds
  • 0.02ct
  • Compare screeners

  • Item
  • Number of stones processed
  • Mobility
  • Stones identified
  • Test time
  • Smallest size detected
  • Price
  • DiaTrue CXL
  • Multiple
  • Stationary
  • HPHT
    CVD
    CZ
    Moissanite
    CVD Coated Simulants
  • 20 seconds
  • 0.003ct
  • DiaTrue CS Scanner
  • Multiple
  • Stationary
  • HPHT
    CVD
    CZ
    Moissanite
    CVD Coated Simulants
  • 20 seconds
  • 0.01ct
  • DiaTrue Mobile
  • Multiple
  • Portable
  • HPHT
    CVD
    CZ
    Moissanite
    CVD Coated Simulants
  • 1-5 seconds
  • 0.001ct
  • GIA iD100 Gem Tester
  • Single
  • Portable
  • HPHT
    CVD
  • 2 seconds
  • 0.005ct
  • presidium syntheticPresidium Synthetic Diamond Screener II*
  • Single
  • Portable
  • HPHT
    CVD

    *Must be used with a tester
  • 2 seconds
  • 0.025ct
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    5/29/2020 Market Prices:
    Gold 1728.70 Platinum 839.00 Silver 17.59