Freshwater Bead-Cultured Pearls with Multiple Features of Interest
GIA’s Hong Kong laboratory examines a freshwater bead-cultured pearl necklace possessing several interesting features.
Low-Fe, High-V Color-Change Burmese Sapphire
The Carlsbad lab identifies a color-change Burmese sapphire with a unique chemistry profile.
Chemical Analysis of Zircon
Trace-element analysis is used to identify metamictization, treatment, and growth conditions of zircon.
Color modification is observed in a reddish orange zircon at the Bangkok laboratory.
A Rare Ruby from Montana
An exceptional ruby specimen is identified with a Montana of origin in the Carlsbad lab.
Freshwater Pearls, Blister and Loose, with Their Host Shells
Three freshwater pearls, two blister and one loose, were examined in the New York lab.
Cat’s-Eye Brazilian Paraíba Tourmaline
Chatoyant vivid blue Brazilian tourmaline examined in the Bangkok lab.
Gemological Analysis of Lightbox CVD-Grown “White” Diamonds
The Carlsbad lab provides a gemological analysis of two Lightbox CVD laboratory-grown near-colorless diamonds.
Large Pargasite Inclusion in Kashmir Sapphire
Unusually large prismatic pargasite inclusions observed in a Kashmir sapphire submitted to the Carlsbad lab for origin determination.
Natural Diamond Mistaken as HPHT Synthetic
Declared synthetic diamond identified as natural in the Carlsbad lab.