Fluor-buergerite

Buergerite is named after M. J. Buerger, eminent crystallographer and President of Mineralogical Society of America (1947).

Buergerite is a rare species of the Tourmaline Group.
General Information
Chemical Formula
NaFe
3+
3
Al
 
6
(BO
 
3
)
 
3
Si
 
6
O
 
18
(O,F,OH)
 
4
Anthony et al, Handbook of mineralogy (2001)
Photos of natural/un-cut material from mindat.org
Physical Properties of Fluor-buergerite
Mohs Hardness7
Anthony et al, Handbook of mineralogy (2001)
Specific Gravity3.31
Anthony et al, Handbook of mineralogy (2001)
TenacityBrittle
Anthony et al, Handbook of mineralogy (2001)
Cleavage QualityDistinct
Anthony et al, Handbook of mineralogy (2001)
Optical Properties of Fluor-buergerite
Optical CharacterUniaxial/-
Anthony et al, Handbook of mineralogy (2001)
PleochroismYellow-brown - very pale yellow
Anthony et al, Handbook of mineralogy (2001)
Colour
Colour (General)Dark brown to almost black with a bronze schiller
Anthony et al, Handbook of mineralogy (2001)
TransparencyTranslucent
Anthony et al, Handbook of mineralogy (2001)
LustreVitreous
Anthony et al, Handbook of mineralogy (2001)
Crystallography of Fluor-buergerite
Crystal SystemHexagonal
Anthony et al, Handbook of mineralogy (2001)
HabitCrystals short to long prismatic, in divergent sprays, segmented, up to 4 cm
Anthony et al, Handbook of mineralogy (2001)
Geological Environment
Where found:Of probable pneumatolytic origin, in cavities in a rhyolite.
Anthony et al, Handbook of mineralogy (2001)
Further Information
Mineral information:Fluor-buergerite information at mindat.org
Significant Gem Localities
Sri Lanka
 
  • Sabaragamuwa Province
    • Ratnapura District
      • Ratnapura
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