A Remarkable 16.71 ct Transparent Orange-Yellow Sodalite
A rare and exceptional example of sodalite is studied in the Bangkok laboratory.
Two Foraminifera-Like Objects Found in a Natural Saltwater Pearl
Examination of a brown nacreous pearl reveals a pair of foraminifera-like spheres.
Treated HPHT Laboratory-Grown Diamond with Dramatic Color Zoning
A Fancy Deep brownish orange treated HPHT-grown diamond exhibits multiple defect concentrations in various growth sectors.
Carbon Dioxide in a Brown Diamond
The Carlsbad lab examines a rare submission of a Fancy Dark brown diamond containing carbon dioxide.
Seed Pearls in an Antique Indian-Style Headdress
GIA’s Mumbai laboratory analyzes seed pearls decorating an Indian-style headdress.
Tubular Feature in a Natural Pearl
Investigation of a tubular feature in a natural pearl reveals evidence of parasitic activity.
Cricket Bat Diamond
A diamond shaped like a cricket bat is submitted to GIA’s Mumbai laboratory.
Unusual Large Nacreous Pen Pearls
A report on the identification of three large baroque pearls submitted to the Mumbai laboratory.
Rare Faceted Thomsonite
A colorless semitransparent thomsonite is examined in the Carlsbad laboratory.
Small Freshwater Bead Cultured Pearls
The Carlsbad laboratory reports on a strand of 78 light bluish gray pearls submitted for identification.