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Three Irradiated CVD Synthetic Diamonds

Sally Eaton-Magaña, August 9, 2018

Irradiated CVD-grown diamonds are examined in the Carlsbad lab.

Within a parcel of 1,102 diamond melee, 1,092 were identified as HPHT synthetics.

One Natural Melee Diamond Found in Large Batch of HPHT Synthetic Melee

Stephanie Persaud, Wuyi Wang, Paul Johnson, and Ivana Petriska Balov, August 9, 2018

A single natural diamond is found within the largest percentage of undisclosed synthetic melee submitted to GIA.

This 15.32 ct cushion modified brilliant is the largest HPHT synthetic diamond graded by GIA.

15 Carat HPHT Synthetic Diamond

Sally-Eaton Magaña and Troy Ardon, August 9, 2018

A synthetic diamond seen in the Carlsbad lab is the largest faceted lab-grown diamond examined by GIA.

10.08 ct HPHT synthetic diamond with color equivalent to Fancy Deep blue

Blue HPHT Synthetic Diamond Over 10 Carats

Terry Poon and Wuyi Wang, January 27, 2017

Results from GIA’s recent testing of a 10.08 ct blue HPHT synthetic diamond, the largest HPHT synthetic recorded to date.

Irradiated Green-Blue CVD Synthetic Diamonds

Kyaw Soe Moe, Ulrika D’Haenens-Johansson, and Wuyi Wang, November 23, 2015

Advancing CVD growth technologies yield intensely coloured, high-quality synthetic diamonds, such as the two green-blue synthetic materials seen in the New York lab.

Synthetic Sapphire and Synthetic Spinel Doublets

Najmeh Anjomani, January 27, 2017

Unusual doublets created from two different synthetics are revealed at the Carlsbad laboratory.

Large Blue and Colourless HPHT Synthetic Diamonds

Wuyi Wang and Terry Poon, August 3, 2016

Five large HPHT synthetic diamonds, examined at GIA’s Hong Kong lab, indicate the advances that HPHT growth technology has made in quality and size.

5.03 ct Fancy Deep Blue HPHT Synthetic Diamond

Largest Blue HPHT Synthetic Diamond

Kyaw Soe Moe, Paul Johnson, Ulrika D’Haenens-Johansson, and Wuyi Wang, April 28, 2016

Analysis of a 5.03 ct HPHT-grown blue synthetic diamond, the largest ever examined by GIA.

Analysis of Yellow Diamond Melee for Colour Treatment and Synthetics

Caitlin Dieck, Manisha Bhoir, and Paul Johnson, April 28, 2016

A parcel revealed to contain natural, treated and synthetic diamonds reinforces the importance of identification.

CVD Synthetic Diamond Over 5 Carats Identified by GIA

Billie “Pui Lai” Law and Wuyi Wang, January 27, 2017

Results from GIA’s recent testing of a 5.19 ct CVD synthetic diamond, the largest it has examined to date.

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