Blue Opal from Chile
Irradiated HPHT-Grown Diamonds with Blue-Green Color Zonation
A Multicore Non-Bead Cultured Pearl
Ruby with Synthetic Overgrowth Lining Cavities
Brown Zoning in Diamond
Interesting Metallic Platelets in Morganite
Rare Musgravite Crystal in Green Sapphire
An Exceptional Cat’s-Eye Emerald
Gold Granulation by Zaffiro
Intarsia Jewelry Box by Nicolai Medvedev and Susan Helmich
Out of Our Mines
Patania Jewelry
Phenomenal Emeralds from Chitral, Pakistan
An Extraordinary Calcite Gemstone
The unusual effects of dispersion and twinning produced by a calcite gemstone.
Ametrine with Layers of Smoky Quartz
Update on Ametrine from the Yuruty Mine, Bolivia
Citrine from Zambia
Elements in Synthetic Overgrowth on Flux-Heated Ruby and Beryllium-Diffused Sapphire
Synthetic overgrowth caused by two different types of treatment are found on two samples in the Tokyo lab.
The Extraordinary Backstory of Natural Diamonds: A Diamond Is (and Has Been) Forever
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