Molybdenite in Topaz
Charting the Increasing Availability and Quality of CVD Synthetic Diamonds
Aquamarine from a New Primary Deposit in Mexico
Fall 2002 Gem News International
Solution-Generated Pink Color Surrounding Growth Tubes and Cracks in Blue to Blue-Green Copper-Bearing Tourmalines from Mozambique
Aquamarine from the Thuong Xuan District, Thanh Hoa Province, Vietnam
Demantoid and Topazolite from Antetezambato, Northern Madagascar: Review and New Data
An important deposit of andradite, containing demantoid and topazolite varieties, has been mined near the village of Antetezambato in northern Madagascar since early 2009.
Brownish Red Zircon from Muling, China
Gem-quality brownish red zircon occurs in alluvium derived from Tertiary alkali basalt at Muling in the northeast Chinese province of Heilongjiang.
Characterization of Colorless Coated Cubic Zirconia (Diamantine)
Growth Method and Growth-Related Properties of a New Type of Russian Hydrothermal Synthetic Emerald
A new type of Russian hydrothermal synthetic emerald is produced by seeded growth in steel autoclaves without noble-metal inserts; the seed slices have been cut parallel to a face of the second-order hexagonal dipyramid s (1121).
Spring 2000 Gem News International
Portable Instruments and Tips on Practical Gemology in the Field
Spring 2004 Gem News International
“Paraíba”-Type Copper-Bearing Tourmaline from Brazil, Nigeria, and Mozambique: Chemical Fingerprinting By LA-ICP-MS
Gem-quality bright blue to green “Paraíba”-type Cu-bearing tourmaline is now known from deposits in Africa (Nigeria and Mozambique), in addition to three commercial localities in Brazil (in Paraíba and Rio Grande do Norte States).
Anahí’s “New” Ametrine
The Anahí mine in southeastern Bolivia has enjoyed consistent production since 1990 and is best known for its ametrine.
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