No Small Thing: Lab Reports Lab-Grown Single-Cut Diamonds

The New York City branch of the Diamond Services laboratory recently identified as synthetic multiple single-cut diamonds, ranging from a quarter point to a half point (0.0025-0.005 carats), set in a piece of jewelry.

Single-cut diamonds generally have 16 to 18 facets, compared to the standard 57 to 58–facet round brilliant. Many smaller stones are polished as single-cuts.

“To the best of my knowledge, this is the first time that a synthetic single-cut stone has been detected mounted in jewelry,” said Joseph Kuzi, Diamond Services founder and managing director, in a statement. “What this means is that almost no diamond can be taken at face value.”

Kuzi added that, with CVD-grown diamonds increasingly being used for industrial purposes, some of the waste from these factories might be ending up as small single-cut diamonds set in jewelry.

The diamonds were contained in an item submitted for testing. After some stones were flagged as possibly synthetic, they were sent to the lab’s Hong Kong facility. De Beers’ Diamondview and Diamond Services’ Mini Raman Spectrometer positively identified them as man-made.

Under the Federal Trade Commission Guides, lab-grown diamonds have to be disclosed.

(Image from Diamond Services)



JCK News Director

5 responses to “No Small Thing: Lab Reports Lab-Grown Single-Cut Diamonds”

  1. So it will be assumed all unbranded jewelry contains lab grown diamonds. I have had this opinion for quite some time.

  2. I wonder what the $$ difference between a .0025-.005ct natural mined single diamond vs a lab-grown single cut diamond. I would think the labor to cut these would be close. I would be very interested for a cutter to respond…
    I respectfully disagree that it can be assumed that “all unbranded jewelry contains lab-grown diamonds”. Is this an opinion or based on some study I’ve missed.

  3. I think if we have to “assume,” it should be that lab grown material will be in jewelry throughout. Branded, designer, and generic. There is no doubt it will find its way into every “facet” in our industry.

  4. I myself will and have been purchasing lab grown diamonds. It’s time to stop the unlawful DE Beer’s mob from holding back the supply of diamonds just to keep the diamond prices high only to benefit themselves. They sell diamonds in the U.S. illegally, they do what ever they can to control diamond sales around the world and they use illegal means .The lab grown diamonds are the future, they are diamonds, they are beautiful, less expensive, grown by honest people, they are not out to control all diamond sales, DE Beer’s gangsters are on their way out, Thank God DE Beer’s illegal activity has finally caught up with them.

  5. Michael, maybe the people growing them are honest but the problem facing the industry is that the people using them in jewelry and or selling them without full disclosure are not being honest.

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