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- Title
AN UPDATE ON TOURMALINE FROM LUC YEN, VIETNAM.
- Authors
Nguy Tuyet Nhung; Le Thi Thu Huong; Nguyen Thi Minh Thuyet; Häger, Tobias; Nguyen Thi Le Quyen; Tran Thi Duyen
- Abstract
Since the late 1980s, tourmaline has been collected with ruby, sapphire, spinel, and other minerals from placers along the rivers and streams of Vietnam's Luc Yen district. In 2004, a body of granitic pegmatite containing tourmaline associated with green feldspar was discovered. Several other sites, spreading over an area of more than 100 km2, were later discovered in the area. Tourmaline from Luc Yen may be colorless, but it also is found in a variety of colors, including gray, pink, green, yellow, brown, and purple. Crystals can reach 20 cm in length and may weigh 2-3 kg or more. Most of the material is of the elbaite species; liddicoatite and uvite are less common. Only a small percentage of the tourmaline is suitable for faceting; the rest is carved or kept as mineral specimens in situ for collectors.
- Subjects
TOURMALINE; GEMS &; precious stones; MINES &; mineral resources; FELDSPAR; CRYSTAL lattices; PEGMATITES
- Publication
Gems & Gemology, 2017, Vol 53, Issue 2, p190
- ISSN
0016-626X
- Publication type
Article
- DOI
10.5741/GEMS.53.2.190