Screening of Mounted Melee Using the GIA iD100
GIA’s new screening device accurately identifies an HPHT-grown melee diamond.
Screening of HPHT Synthetic Melee With Natural Diamonds
A screening service allows the lab to screen for synthetic material in diamond melee parcels.
Chameleon Diamond with Nickel Absorption Band
A rare chameleon diamond is examined in GIA's Carlsbad lab.
Yellow CVD Synthetic Diamond
A Fancy yellow type Ib CVD-grown synthetic diamond undergoes testing at the New York lab.
Color modification is observed in a reddish orange zircon at the Bangkok laboratory.
Rare Faceted Wurtzite
A stone submitted for identification is revealed to be the first wurtzite examined by the GIA lab.
Flux-Grown Synthetic Ruby with Hydrothermal Synthetic Seed Crystal
An unusual synthetic ruby, combining a hydrothermal ruby seed and flux ruby overgrowth, is examined at the Carlsbad lab.