Irradiated HPHT-Grown Diamonds with Blue-Green Color Zonation
Green Haüyne
Colored Bands in CVD-Grown Diamond
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
Ruby with Synthetic Overgrowth Lining Cavities
Two Imitation Melo Pearls
GIA’s Hong Kong and Bangkok laboratories report on imitation pearls with a striking resemblance to natural Melo pearls.
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