Spray of Columbite Crystals in Topaz
Turquoise Planet Earth
Star Topaz from Vietnam
Identification of Natural, Reconstructed, and Imitation Root Amber
A “Cobalt Blue” Gahnospinel
Large Faceted Pallasitic Peridot
Aegirine in Poudretteite
“Fishbone” Inclusion in a Burmese Peridot from Mogok
Two Pearls of Indian Cultural Significance
Ancient Script-Like Serpentine in Brown Peridot
Sweet Home Mine Rhodochrosite from 1888
A rhodochrosite on display at AGTA dates back more than a century to Colorado’s Alma Mining District.
Sapphires from Thammannawa, Kataragama Area, Sri Lanka
The February 2012 discovery of high-quality blue sapphires at Thammannawa near Kataragama in southeastern Sri Lanka has intensified gem mining and exploration in the surrounding area and all over the country.
钻石中非同寻常的哑铃状内含物 (英语)
Examination of a 0.40 ct near-colorless round brilliant diamond with a large inclusion resembling a dumbbell
Japanese Jadeite Tables
Letters: Nacken Synthetic Emeralds: Additional Information
Finds from the Secondary Market
Dave Bindra shows some noteworthy pieces he obtained on the secondary market and shares his thoughts on the state of the colored stones market.
Multi-Generation Cutting Family from Idar-Oberstein
The Cause of Iridescence in Rainbow Andradite from Nara, Japan
“Rainbow” andradite from Nara, Japan, occurs as relatively small orangy brown crystals that show attractive iridescence in almost the entire range of the spectrum.
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