Cat’s-Eye Paraíba Tourmaline with Copper Inclusions
The Tokyo laboratory examines a Paraíba tourmaline with chatoyancy caused by copper inclusions.
Fraudulently Inscribed Synthetic Moissanite
The Mumbai laboratory finds a fraudulent GIA inscription on synthetic moissanite.
A Non-Nacreous Pearl Reportedly from Telescopium telescopium
An examination of the first natural pearl reportedly discovered in a Telescopium species.
Treated “Nickel-Rich” Green Diamond
Examination of a Fancy yellow-green diamond attributes color to both natural and artificial mechanisms.
Treated Orange and Pink CVD Laboratory-Grown Diamond
The Carlsbad laboratory reports on two CVD-grown diamonds subjected to multiple treatments to achieve their final color grades.
Exceptional Natural-Color Fancy Red Diamond
An extremely rare natural-color red diamond is submitted to the Carlsbad laboratory.
Gota de Aceite–Like Effect in a Brazilian Emerald
GIA’s Tokyo laboratory examines a Brazilian emerald with a gota de aceite–like effect characteristic of Colombian emeralds.
Rare Kashmir Star Sapphire
A stunning large Kashmir star sapphire, set in a combination ring and pendant, is submitted to the New York laboratory.
A Synthetic Moissanite Presented as Natural Diamond Rough
The New York laboratory identifies a sample submitted for a colored diamond identification and origin report as synthetic moissanite.