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New Deposit of Pezzottaite from Madagascar
A highly saturated purplish pink to red pezzottaite from a new deposit in Madagascar is encountered in Tucson and tested by GIA researchers.
Large CVD-Grown Diamond Resubmitted after HPHT Treatment
Aquamarine with Fluorite Inclusions
In Memoriam: Alan Hodgkinson (1937–2024)
Fancy Vivid Yellow HPHT-Grown Diamonds
Trapiche-Type Emeralds from Pakistan
Unusually Large Flux-Grown Synthetic Sapphire
The Gujar Killi Emerald Deposit, Northwest Frontier Province, Pakistan
Over the last decade, Pakistan has developed into an important source for many gem materials. A number of localities have been identified for emeralds in particular.
Two Black Non-Nacreous Bead Cultured Pearls from Pinctada margaritifera
Supporting the Researchers of Tomorrow
Diamond Geology
