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Tourmaline; the kaleidoscopic gemstone

Federico Pezzotta and Brendan M. Laurs
Tourmaline; the kaleidoscopic gemstone
Elements (October 2011) 7 (5): 333-338


With their multitude of colors, gem tourmalines are among the most popular colored gemstones. Spectacular color-zoned tourmalines are valued as gems and crystal specimens, and some complexly zoned crystals contain nearly the entire spectrum of color variation found in the mineral world. The top-quality "neon" blue-to-green, copper-bearing tourmaline, the Paraiba-type, is one of the highest-priced colored gemstones, with values comparable to those of some diamonds. The wide variety and intensity of colors are related primarily to color-producing ions in the structure and to exposure to natural radiation. Gem tourmalines that form in magmatic, pegmatitic environments are most commonly elbaite and fluor-liddicoatite species, and the rarer gem tourmalines that develop in metamorphic rocks are generally dravite-uvite species.

ISSN: 1811-5209
Serial Title: Elements
Serial Volume: 7
Serial Issue: 5
Title: Tourmaline; the kaleidoscopic gemstone
Affiliation: Natural History Museum, Milan, Italy
Pages: 333-338
Published: 201110
Text Language: English
Publisher: Mineralogical Society of America and Mineralogical Society of Great Britain and Ireland and Mineralogical Association of Canada and Geochemical Society and Clay Minerals Society, International
References: 35
Accession Number: 2011-103523
Categories: Mineralogy of silicatesEconomic geology, geology of nonmetal deposits
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table
N29°00'00" - N38°15'00", E60°00'00" - E75°00'00"
S23°30'00" - S14°00'00", W51°00'00" - W39°45'00"
S27°00'00" - S10°00'00", E30°00'00" - E41°00'00"
N04°00'00" - N14°00'00", E02°30'00" - E14°30'00"
Secondary Affiliation: Gemological Institute of America, USA, United States
Country of Publication: International
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, copyright, Mineralogical Society of America. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201152
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