The board of directors of GIA India Laboratory Pvt. Ltd. (GIA India) has appointed Amit Pratihari as managing director, responsible for all aspects of GIA India’s gemological laboratories in Mumbai and Surat, as well as the GIA India school in Mumbai.

The board of directors of GIA India Laboratory Pvt. Ltd. (GIA India) has appointed Amit Pratihari as managing director, responsible for all aspects of GIA India’s gemological laboratories in Mumbai and Surat, as well as the GIA India school in Mumbai.

A sugar plum–like frosted zircon cluster is observed in a blue sapphire.

A look at Ishaia Gol’s extraordinary career as a diamond dealer.

Rutile needles intersect to form a star in colorless quartz.

A green stone in a pendant necklace is identified as a quartz assemblage at the New York laboratory.

Amphibole pebbles in quartz resemble rocks stacked in a stone wall.

The Tokyo laboratory examined a purplish pink pezzottaite cabochon displaying multiple cat’s-eyes.

A new source of väyrynenite produces specimens in larger sizes with higher clarities than material from other sources.

Numerous monazite crystals are observed in colorless quartz.

X-ray fluorescence screening is used to identify an imitation in a submission of more than 9,000 seed pearls.

A well-formed lithiophilite crystal is identified in colorless quartz.

Biogenic material from a pearl oyster is used to produce a new eye-catching blue-green iridescent gem material.

Three large natural pearls with hollow interiors reportedly from Bahrain are studied in the Mumbai laboratory.

The Dubai laboratory reports on four diamonds inscribed with fraudulent GIA report numbers.

GIA’s Bangkok laboratory reports on a hybrid mollusk species that can produce bead cultured pearls with a thicker nacre layer.

A previously unidentified cause of green color in CVD-grown diamonds is detected for the first time in a diamond submitted to the Carlsbad laboratory.