In Memoriam: Heitor Barbosa
A Unique Omphacite Jade Pendant
More on Virtu Gem’s Ethical Supply Chain Practices
An update on Virtu Gem’s mission to improve artisanal mining and gem trading practices in Kenya, Malawi, and Zambia.
Oregon Sunstone Update
Conservation Concerns over Use of Tridacna Shell in Imitation Pearls
The New York lab investigates the use of the shells of Tridacna species as imitation pearls.
Carbon Dioxide in a Brown Diamond
Two Foraminifera-Like Objects Found in a Natural Saltwater Pearl
Rare Natural Bicolor Diamond
A Remarkable 16.71 ct Transparent Orange-Yellow Sodalite
Cross in Natural Diamond
Chrysoberyl from the New England Placer Deposits, New South Wales, Australia
Examines a collection of chrysoberyl samples from these sapphire placer deposits to determine their distinct mineralogical and chemical properties.
Large and Unusual Gems
A Large Baroque Tridacna Gigas (Giant Clam) Pearl
Ruby in Diamond
A Chart for the Separation of Natural and Synthetic Diamonds
Visible Absorption Spectra of Colored Diamonds
Tucson: A Showcase of Colored Gemstone Innovation
Afghan Emerald, Tajik Ruby, and Clarity-Enhanced Tourmaline
.jpg "YMAL GIA Ed")
