NDT Produces Record-Breaking Synthetic 10.07 Carat Blue



This stone is more than double the size of its previous notable blue

Russian company New Diamond Technology (NDT) announced it has produced a new blue diamond (pictured) that it calls the world’s largest lab-grown blue diamond, more than twice the size of its prior notable blue stone.

The “world’s largest lab-grown blue diamond” is a 10.07 ct. fancy deep blue SI Asscher cut. Its IGI grading report can be seen here.

The company had previously produced a 5.03 ct. blue.

It is difficult to value lab-grown diamonds, and auction houses generally won’t sell them. However, the 5.03 ct. blue sold to a retailer for $250,000, who in turn sold it to a buyer for an undisclosed amount, says company president Tamazi Khikhinashvili.

Khikhinashvili admits that if the diamond were natural, it would likely fetch millions.

But he adds, “People buy natural blues for investment and never wear them. This is something somone can wear.”

The company has also produced what it calls “the world’s largest lab-grown colorless round”—a 6.07 ct. H VVS1 round. Its grading report can be seen here.

It previously produced a 10.2 ct. colorless stone, but that was an emerald cut. 

The stones are being exhibited by NDT at the Hong Kong Jewellery & Gem Fair, which opens tomorrow.

(Photo courtesy of New Diamond Technology)

JCK News Director


  • Shiv C

    Sounds absolutely magnificent & majestic. The picture shows a beautiful blue eye clean diamond, should be a treat for the eyes.

  • Aren’t most of us waiting for the Forbes or Business Week feature that will proclaim any man-made diamond, no matter how excellent the “four C’s” of that man-made stone are, will NOT appreciate in value over time?

    It will happen. In fact, just the opposite is highly likely. History proves it.

    As innovation and investor dollars increase, the man-made (lab grown) market will flood the world with their man-made creations – each company outdoing the other. Great news for natural diamonds though…

    Just as the technology sector proves to us year after year, the easier / faster it is to create anything in higher volume with the same or greater quality, the less that item will be sold for when the market is flooded. Does anyone still own a VHS deck? Remember the opening SRP on those items? They were priced high (at first) then prices shot down and now rarely sold.

    Natural diamonds win from a marketing, storytelling, romance and history aspect – hands down. Yet naturals also win on a long-term market appraisal/ equity side. Just as in contemporary jewelry materials (such as Tungsten) that will never appreciate in value, we see “comparative” precious metals such as gold, platinum and even palladium viewed as an investment. That is because they are just that and Tungsten isn’t and won’t be. Period.

    I am not trying to kill man-made stones; we should embrace them! Man-made provides a genuine comparison to natural diamonds in any long-term investment/value proposition. This is very powerful and proven. Sell both – just provide the facts, don’t you agree?

    Perhaps a few, man-made diamond “collectible items,” such as the 10.7 stone above could appreciate in value since it holds a “title.” But until man-made diamonds provide a “fifth C,” I fail to see how any man-made stone will stand cut-to-cut with naturals from an investment standpoint.

    • I agree with you 100%. And I think those of us who understand this, we
      need to start countering the idea that is recently being spread among
      consumers that “mined diamonds are NOT rare”…that it’s all a hoax
      created by DeBeers”! Diamonds have fascinated humankind, and been sought
      by those wealthy / powerful enough to own them for centuries,
      pre-dating the Roman period! DeBeers had the vision to expand “the
      dream” to the rapidly rising “middle classes” in the late 19th
      century…by expanding on already-held images and beliefs. And whether
      anyone likes it or not, diamonds have NATURAL PHYSICAL CHARACTERISTICS
      NO OTHER NATURAL GEM POSSESSES…and its ability to move light in ways
      no other natural product can also adds to its allure. But the fact
      remains that SYNTHETIC/LAB-GROWN/FACTORY-PRODUCED (my personal favorite
      as it is more accurate) are MASS-produced and while they offer some of
      the optical and physical properties of naturally occurring diamonds,
      they are NOT rare and “rarity” is what drives prices. And as more and
      more non-natural diamonds enter the market, prices will drop because–
      despite rumors to the contrary–natural versus non-natural diamonds can
      be distinguished by gemological examination.