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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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Research
Afghan Emerald, Tajik Ruby, and Clarity-Enhanced Tourmaline
Large and Unusual Gems
In Memoriam: Heitor Barbosa
Yellow Mn-rich Tourmaline from the Canary Mining Area, Zambia
High-End Colored Gems
The Elahera Gem Field in Central Sri Lanka
The Elahera gem field currently provides approximately 35% of the gemstones exported from Sri Lanka.
Gemstone Durability: Design to Display
Summer 1996 Gem News International
Gem-Bearing Pegmatites: A Review
A survey of the current gemological knowledge of pegmatites, including the gem varieties aquamarine, tourmaline, and topaz.
Gem Pegmatites of Minas Gerais, Brazil: The Tourmalines of the Governador Valadares District
Summer 2009 G&G Lab Notes
