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Tourmaline
Tourmalines have a variety of exciting colors with one of the widest color ranges of any gem.
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Multi-Generation Cutting Family from Idar-Oberstein
Alexander Arnoldi explains the strategy of Arnoldi International and provides an update on some new high-quality materials.
Unique Moiré-Pattern Metallic Inclusion in Paraíba Tourmaline
An intriguing inclusion scene is analyzed in a Paraíba tourmaline from Brazil.
Imitation Rubellite Boulders
Specimens presented as rubellite tourmaline rough are found to be resin imitations with lead inserts.
Ancient Tourmaline and Beryl from Afghanistan
Examination of a large private collection of beads and carvings from antique excavations, assembled in the 1970s by a collector in Afghanistan.
Winter 2007 Gem News International
A compilation of gem news from around the world, covering topics such as localities, unusual gem materials, market news, new products, discoveries, jewelry manufacturing techniques, and industry trends.
Winter 1990 Gem News International
A compilation of gem news from around the world, covering topics such as localities, unusual gem materials, market news, new products, discoveries, jewelry manufacturing techniques, and industry trends.
Winter 1991 Gem News International
Winter 1989 Gem News International
Winter 1989 G&G Lab Notes
This section, from the Winter 1989 issue of Gems & Gemology, is a compilation of interesting finds from GIA's laboratories.
