Ruby with Synthetic Overgrowth Lining Cavities
An unusual area of granular texture lining the cavity of a ruby indicates synthetic overgrowth.
Iridescent Tubes in Pezzottaite
A large purplish pink pezzottaite with growth banding and tube inclusions is examined in the Carlsbad laboratory.
A Multicore Non-Bead Cultured Pearl
A non-bead cultured pearl with six cores is discovered in a large lot of pearls submitted to the Mumbai laboratory.
Irradiated HPHT-Grown Diamonds with Blue-Green Color Zonation
The Carlsbad laboratory reports on two HPHT-grown diamonds with interesting sector-dependent color zonation.
Colored Bands in CVD-Grown Diamond
A CVD-grown diamond submitted to the Surat laboratory exhibits a growth remnant appearing as a colored band.
Two Imitation Melo Pearls
GIA’s Hong Kong and Bangkok laboratories report on imitation pearls with a striking resemblance to natural Melo pearls.
Metallic Core in a Natural Freshwater Pearl
Examination of a natural freshwater pearl reveals a metallic core and suggests environmental contamination during the pearl’s formation.
Natural Pearl Necklace from Baja California Sur, Mexico
The Carlsbad laboratory reports on a recently submitted necklace containing 63 pearls of various colors, shapes, sizes, and mollusk species, reportedly from Mexico.
Fashioned Queen Conch Shell Bead
A Queen conch shell bead is submitted for pearl identification to the Mumbai laboratory.