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featured Research & News


Sphalerite in Topaz

The first documented example of sphalerite as a crystal inclusion in colorless topaz.
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Gem News International

Preliminary Study on Rubies

Reports on the internal features and spectroscopic and trace-element analysis of rubies reportedly from Pokot, Kenya.
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Etch Marks, Negative Crystals, and Etch Tubes in Spinel

A spinel from Madagascar, mixed in with a parcel of blue sapphire, exhibited an array of internal features.
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Industry Analysis

Blue Nile Sale Surprises Analysts, Argyle Auctions ‘Best’ Colours

Big changes for the online diamond retailer, plus: Rio Tinto offers record quality of fancy colour diamonds.
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Book Review

Stoned: Jewelry, Obsession, & How Desire Shapes the World

A web of stories that sheds light on epic jewellery lore while unravelling some of the most notorious & familiar legends.
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