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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.

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Spring 2015 G&G Examines Blue Spinel, Chinese Jewellery Design and the Latest in Synthetics

Russell Shor, June 12, 2015

G&G Brief presents an overview of the content of the Spring 2015 issue of Gems & Gemology.

A Larger, Higher-Quality NPD Synthetic Diamond

Paul Johnson and Kyaw Soe Moe, January 30, 2015

GIA’s New York laboratory recently detected an undisclosed NPD synthetic diamond, a 1.51 ct Fancy Black round.

Pseudo-synthetic growth structure observed in natural diamond

Paul Johnson

This stone was a good example of a very rare natural diamond exhibiting synthetic growth characteristics.