Company "New technologies diamond» (NDT) introduced a laboratory-grown diamond weighing 10.07 carats, which it claims is the world's largest synthetic blue diamond.
Stone emerald-cut, fancy blue color, SI1 category has been certified by the International Gemological Institute (International Gemological Institute, IGI) in Antwerp and last week put up for display at the Fair jewels and gems in Hong Kong (Hong Kong Jewellery & Gem Fair) .
As stated by the company from St. Petersburg, in March, it introduced a synthetic blue diamond weighing 5.03 carats at the Baselworld fair in Switzerland. Stone was produced using HPHT technology.
In May last year, NDT claim to produce "the world's largest colorless lab-grown diamond" weighing 10.02 carats and got it certified in the IGI.
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Synthetic diamonds for a decade nourish the jewelry market, but it is impossible to give an exact quantitative proportion. According to various estimates, it ranges from several thousand to almost three billion carats, the French newspaper Le Monde reported.
"The lack of reliable statistics is one of the biggest shortcomings of the diamond industry," - cites the publication of the words of Rob Bates, editor of the online online magazine JCK Online.
According to one of the few official estimates prepared by the Gem and Jewelery Export Promotion Council (GJEPC), the annual production of synthetic diamonds is about 350 thousand.
Carats per year (against 150 million carats of gross mining of natural diamonds), which in value terms varies between $ 45 million and $ 135 million. "Most manufacturers are private companies, and some demonstrate greater secrecy." In addition, newcomers are emerging, especially in Russia and China, "notes Bates.
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