129.47 Carats: Cultivated Diamonds Set Another World Record

New Diamond Technology Cultivated Diamond Company in St. Petersburg, Russia, this month produced a type Ib HPHT (High Pressure and High Temperature) single crystal grown diamond rough with a weight of 129.47 carats and a size of 29.5×29,5x21mm (as shown below), which once again broke the large particles The world record for cultivating diam...

Match “Chang’e” With Diamonds! Superhard Materials Experts Make New Achievements

“Chang’e” flew to the moon, stunning the world! “Changing Five” sends “Changing Five”, the moon goes to “dig earth”. With the successful launch of Chang’e 5, China’s first lunar sample return mission continues to attract worldwide attention! At 22:00 on December 2, after about 19 ...

12.75 Carats! The World’s Largest Cvd Diamond

In November 2020, the IGI International Gemological Institute recently inspected a gem-quality CVD cultivated diamond (finished diamond) weighing 12.75 carats. Its rough stone weighs 46.20 carats. This is currently the world’s largest CVD cultivated diamond. IGI gemologists confirmed that this 12.75 carat CVD diamond is type IIa, with a cl...

International Diamond Conference And 2020 China Superhard Material Technology Development Forum Held In Changzhou

On November 10, 2020, the International Diamond Conference and 2020 China Superhard Materials Co-sponsored by the Superhard Materials Branch of China Machine Tool Industry Association, the Superhard Materials and Professional Committee of the Chinese Society for Materials Research, and the State Key Laboratory of Superhard Materials and Abrasive...