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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.

Strong Pinkish Purple Freshwater Bead-Cultured Pearls

Yixin (Jessie) Zhou and Chunhui Zhou, July 31, 2015

A necklace of Chinese freshwater bead-cultured pearls demonstrates the strides made in culturing techniques.

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.

A Useful Technique to Confirm the Hydrophane Nature of Opal

Nathan Renfro, October 17, 2013

Observing a water drop’s interaction with opal, as well as refractive index, can confirm a specimen’s hydrophane nature with less risk of breakage than total immersion.

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