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Summer 1986 G&G Lab Notes
Characterization and Grading of Natural-Color Pink Diamonds
Known for their great beauty and rarity, pink diamonds have long been sought after by jewelers, collectors, and consumers.
Beyond Beauty: A Garnet Necklace Decoded
In Memoriam: Glenn Lehrer (1953–2024)
New Technologies and Techniques
Iridescent Gems Cut from Hinge Ligament of South Sea Pearl Oyster (Pinctada maxima)
Ruby and Sapphire from the Tan Huong-Truc Lau Area, Yen Bai Province, Northern Vietnam
Primary and secondary deposits in the Tan Huong–Truc Lau area of northern Vietnam’s Yen Bai Province have supplied rubies and some sapphires for more than a decade.
Gem Localities and Formation
A Red Herring in a Red Garnet
G&G Facebook Group Surpasses 40,000 Members
Out of Our Mines
