Tavorite

Tavorite is named after Elysairo Tavora, Professor of Mineralogy, University of Brazil, Rio de Janeiro, Minas Gerais, Brazil.

Tavorite occurs as transparent to translucent grass green, greenish yellow, yellow green, yellow well-formed fine sized crystals with vitreous lustre.
General Information
Chemical Formula
LiFe
3+
 
(PO
 
4
)(OH)
Anthony et al, Handbook of mineralogy (2001)
Photos of natural/un-cut material from mindat.org
Physical Properties of Tavorite
Specific Gravity3.32
Anthony et al, Handbook of mineralogy (2001)
Optical Properties of Tavorite
Refractive Index1.795 to 1.86
Anthony et al, Handbook of mineralogy (2001)
Optical CharacterBiaxial/+
Anthony et al, Handbook of mineralogy (2001)
PleochroismYellow-green - colorless
Anthony et al, Handbook of mineralogy (2001)
DispersionStrong
Anthony et al, Handbook of mineralogy (2001)
Colour
Colour (General)Greenish yellow, grass-green, bright apple-green
Anthony et al, Handbook of mineralogy (2001)
TransparencyTransparent,Translucent
Anthony et al, Handbook of mineralogy (2001)
LustreVitreous
Anthony et al, Handbook of mineralogy (2001)
Crystallography of Tavorite
Crystal SystemTriclinic
Anthony et al, Handbook of mineralogy (2001)
HabitCrystals to 5 mm; commonly very fine-grained, massive, in veinlets, disseminated, and thin films.
Anthony et al, Handbook of mineralogy (2001)
Geological Environment
Where found:A secondary oxidation product of earlier phosphates in complex zoned granite pegmatites.
Anthony et al, Handbook of mineralogy (2001)
Further Information
Mineral information:Tavorite information at mindat.org
Significant Gem Localities
USA
 
  • South Dakota
    • Custer Co.
      • Custer District
        • Custer
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