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Formula:   Al2(SiO4)(FOH)2   mineral photo

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Crystal:   Orthorhombic  
Hardness:   8  
Spec. Gr.:   3.49-3.57  
Streak:   White  
Cleavage:   Perfect basal  
Location:   Mogok, Myanmar

Topaz is found in colors of light-blue, pale violet, pink, golden-brown, greenish and white. Fine crystals are found at Ouro Preto, Minas, Gerais, Brazil (honey-brown), Little Three mine, Ramona, California (blue), and Gilgit division, Pakistan (sherry-colored). In 1998 a few absolutely clear, pure white, well-formed topaz crystals (one is displayed in the UCSB Geology Collection) were found at the Pain Pyit mine near Mogok, Myanmar, formerly Burma.

Bibliography: Svenek, Jaroslav, Minerals, 1987, pg. 176-177.

University of California, Santa Barbara—Department of Earth Science
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