Variscite from Central Tajikistan: Preliminary Results
A look at the gemological properties and chemical composition of this light blue to light green to green gem material, which is suitable for cabochon cutting.
Hydrophane Opal Treatment
An opal rough is immersed in water and treated with oil and Opticon to observe effects on transparency and play-of-color.
Update on the Scorpion Tsavorite Mine
A look at the resumed operations and new production of Kenya’s Scorpion tsavorite mine.
Rare Emerald from China and Pink Sapphire from Sri Lanka
An emerald from a largely unexplored Chinese deposit is seen at Tucson, along with a pink sapphire recut after removal from a necklace.
Book Review: The Guy Ladrière Collection of Gems and Rings
Review of The Guy Ladrière Collection of Gems and Rings, by Diana Scarisbrick, Claudia Wagner, and John Boardman.
Book Review: Wartski: The First Hundred and Fifty Years
Review of Wartski: The First Hundred and Fifty Years, by Geoffrey Munn.
Book Review: Cartier Royal High Jewelry and Precious Objects
Review of Cartier Royal High Jewelry and Precious Objects, by François Chaille.
Book Review: The Classic Goldsmith
Review of The Classic Goldsmith, by Mark Maxwell.
Book Review: Collector’s Guide to the Amphibole Group
Review of Collector’s Guide to the Amphibole Group, by Robert J. Lauf.
Dolomite with Unusual Inclusions
Inclusions in gem-quality dolomite are found to be the rare mineral svanbergite.