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Here’s How Lab-Grown Diamond Detectors Stacked Up in Recent Testing

The sample was ‘deliberately challenging.’




Three detectors conclusively identified all lab-grown diamonds in a recent study, Rapaport News reports.

A collaboration by the Diamond Producers Association and Signet Jewelers – the Assure Program – published the results from the independent performance tests of Diamond Verification Instruments in the Assure Directory on

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One of the machines identifying all lab-grown diamonds was the Sherlock Holmes machine by Yehuda, which sells for about $6,500.

The De Beers DiamondView identified 100 percent of lab-grown diamonds. It sells for about $35,000.

The Presidium Synthetic Diamond Screener II identied all lab-grown diamonds. But the machine, which sells for $600, had a false-positive rate of nearly 16 percent. It “works by screening out type IIa colorless diamonds, as those are likely to be synthetic, rather than actually identifying lab-growns,” according to Rapaport.

The sample was described as “deliberately challenging.”


Several other models referred all lab-grown diamonds for additional testing, Rapaport explains. This group, which is not designed to detected lab-growns conclusively, included:

  • De Beers’ SYNTHdetect ($17,000).
  • De Beers’ DiamondSure ($18,200).
  • Gemological Institute of America’s iD100 ($4,995).
  • HRD Antwerp’s M-Screen+ ($63,000).

Through the Assure Directory, trade participants can access objective and third-party-verified information on the relative performance of Diamond Verification Instruments and guidance on how to ensure that their business is protected from undisclosed laboratory-grown diamonds.

Visit the ASSURE Directory on to learn more about the test results and to download guidelines on how to ensure pipeline integrity.

Read more at Rapaport News



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