The Distinction of Natural from Synthetic Alexandrite by Infrared Spectroscopy
Spray of Columbite Crystals in Topaz
Turquoise Planet Earth
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
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.
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