Spectroscopic study of natural gem quality "Imperial"-Topazes from Ouro Preto, Brazil

Author: Schott Stefanie   Rager Helmut   Schürmann Kay   Taran Michail  

Publisher: E. Schweizerbart'sche Verlagsbuchhandlung

ISSN: 0935-1221

Source: European Journal of Mineralogy, Vol.15, Iss.4, 2003-08, pp. : 701-706

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