10 Dec 2019
DiamondWorld Directory
Home |
News
Home
GIA Lab examines the largest blue synthetic diamond
The diamond is a 5.03 ct fancy-color HPHT-grown type IIb synthetic diamond produced by NDT
By: Diamond World News Service
|
Feb 24 2016 9:55AM
|
Reference: 12728  

DecreaseIncrease
Researchers from GIA’s New York laboratory, Kyaw Soe Moe, Paul Johnson, and Ulrika D’Haenens-Johansson have presented a lab note on the largest blue synthetic diamond. In January 2016, GIA’s New York laboratory examined a 5.03 ct fancy-color HPHT-grown type IIb synthetic diamond produced by NDT, the largest faceted blue laboratory-grown diamond studied so far. Large colorless and near-colorless HPHT-grown diamonds by the Russian company NDT have been investigated, with sizes up to 5.11 carat.

The largest faceted colorless HPHT-grown synthetic diamond reported to date is a 10.02 ct E-color, VS1-clarity specimen, reported by IGI Hong Kong in 2015.

The diamond investigated by GIA, is an emerald-cut synthetic diamond, color graded as Fancy Deep blue, a very attractive color with no other color component, a prized rarity among natural type IIb diamonds.

When viewed under a microscope, faint but sharp color zoning could be seen, indicative of the uneven impurity incorporation of HPHT synthetic diamonds. The diamond has VS1 clarity, only very small metallic inclusions and a cavity observed at the girdle. Fluorescence and phosphorescence images collected using a DiamondView instrument revealed the sample’s cuboctahedral growth pattern, another feature of HPHT synthetics.

This 5.03 carat sample is the largest HPHT-grown blue synthetic diamond examined at a GIA laboratory. As the size and quality of synthetic diamonds improve, careful identification is essential. Representative HPHT synthetic diamond characteristics seen in this specimen, such as the lack of tatami strain patterns (which are typically observed in natural type IIb diamonds), faint but sharp color zoning, and small metallic inclusions from the metal-catalyst flux, can be detected using a gemological microscope, emphasizing its continued importance in gem identification. GIA noted that this is a development that will eventually impact the jewelry industry.

Have Your Say
* Your view
* Name:
* Email:
* Town/city:
* Country/State:
Search News by City
Recent Issue
2019
AVAILABLE NOW...!
News in Pictures
Videos
Young Diamantaires
Pictures: 16
Stunning Jewellery from Cannes 2019
Pictures: 24
Sparkly Jewels at Oscars 2019
Pictures: 19
Golden Globes 2018
Pictures: 15
Spotted: Who Wore What (December 2018)
Pictures: 4
India Diamond Week
Pictures: 8
Spotted: Who Wore What (October 2018)
Pictures: 7
Spotted: Who Wore What (September 2018)
Pictures: 6
70th Emmy Awards
Pictures: 11
35th India International Jewellery Show 2018
Pictures: 46
JJS - IJ Jewellers Choice Design Awards 2015 powered by GIA
Views: 22512
GJEPC Chairman Interview
Views: 20556
IJ Jewellers Choice Design Awards 2012 - Part 1
Views: 27744
Promo for IJ Awards 2012 at NDTV Profit
Views: 40692
IJ Jewellers Choice Design Awards 2012- Part 2
Views: 44434
Couture India 2016 - A Business Boutique Show by IJ Magazine
Views: 17488
Savjibhai Dholakiya, Surat Businessman (Diamond Merchant) speaks in Vibrant 2015
Views: 42571
IJ Jewellers Choice Design Awards 2013 - NDTV Video
Views: 40318
Advertisement
Finestar Diamonds
Advertisement
M.Tarun
Member of:
Supporter of: