Fire Obsidian’s Beguiling Spectrum
Gem Topaz from the Schneckenstein Crag, Saxony, Germany: Mineralogical Characterization and Luminescence
Characterizes yellow topaz from this historical source, with particular emphasis on its photo luminescence behavior.
The Ultimate Gemologist:A Tribute to Richard T. Liddicoat
On this occasion—the celebration of Richard T. Liddicoat’s 50 years guiding Gems & Gemology—it is fitting to review his enormous impact on the field of gemology.
A Large Multicolored Natural Blister Pearl
Pink Diamonds from Australia
The author reports on a sudden influx of natural fancy pink diamonds and their origins.
Color Grading of Colored Diamonds in the GIA Gem Trade Laboratory
Microscopic Shells in Natural Pearls from Pinctada radiata
Two pearls from Bahrain containing minute shells are examined at GIA’s Mumbai laboratory.
Spring 2024 Auction Highlights
Aquamarine from a New Primary Deposit in Mexico
Turquoise Planet Earth
Four-Rayed Star Chrysoberyl
