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CategoryCyclosilicate mineral
Chemical formulaNaFe3+3Al6(BO3)3Si6O18(O,F,OH)4
ColorBronze, dark brown, black
Crystal systemTrigonal - ditrigonal pyramidal (3m)
CleavageDistinct prismatic
Mohs Scale hardness7
Refractive indexnω = 1.735 nε = 1.655
Optical PropertiesUniaxial (-)
Birefringenceδ = 0.080
Streakyellowish brown
Specific gravity3.31

Buergerite is a mineral species belonging to the tourmaline group. It was first described for an occurrence in rhyolitic cavities near Mexquitic, San Luis Potosi, Mexico. It was approved as a mineral in 1966 by the IMA and named in honor of Martin J. Buerger (1903-1986) Professor of Mineralogy at the Massachusetts Institute of Technology. It has also been reported from Minas Gerais, Brazil, and the Central Bohemia Region of the Czech Republic.[1][2][3]


  1. ^ Handbook of Mineralogy
  2. ^ Mindat
  3. ^ Webmineral data
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Buergerite". A list of authors is available in Wikipedia.
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