Wednesday, 12 April 2017

‘World’s largest’ synthetic diamond record broken again

Russian company New Diamond Technology (NDT) claims to have set another record for the “world’s biggest” synthetic blue diamond. It has unveiled a 10.07-carat emerald-cut fancy deep blue stone, which was created using the high pressure, high temperature (HPHT) process.
The faceted jewel was cut from a 32.2-carat stone that was grown within 300 hours. In June 2015, NDT created a 10.02-carat square emerald-cut colourless diamond. It was one of a succession of synthetics claimed to have been at one time the “world’s biggest”. The IGI in Hong Kong certified the type IIa stone as having VS1 clarity and E colour with a “very good to excellent” finish grade.