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- Title
Aquamarine from the Thuong Xuan District, Thanh Hoa Province, Vietnam.
- Authors
Le Thi-Thu Huong; Hofmeister, Wolfgang; Häger, Tobias; Nguyen Ngoc Khoi; Nguy Tuyet Nhung; Atichat, Wilawan; Pisutha-Arnond, Visut
- Abstract
Vietnamese aquamarine is notable for its attractive color and well-formed crystals. Commercially significant deposits are known only from the Thuong Xuan District in Thanh Hoa Province, where the aquamarine (as well as topaz) have been mined from granitic pegmatites and associated eluvial deposits. Rough and cut samples were investigated by standard gemological methods, Raman and IR spectroscopy, and electron microprobe and LA-ICP-MS chemical analysis. The samples were characterized by a low concentration of alkalis and relatively high amounts of iron and cesium. Raman and IR spectroscopy showed the presence of CO2 and type I H2O in the beryl structural channels.
- Subjects
VIETNAM; GEMS &; precious stones; CRYSTALS; PEGMATITES; BERYL; GEMOLOGY; RAMAN spectroscopy; INFRARED spectroscopy
- Publication
Gems & Gemology, 2011, Vol 47, Issue 1, p42
- ISSN
0016-626X
- Publication type
Article
- DOI
10.5741/GEMS.47.1.42