Parisite

Parisite is named after J.J. Paris, mine owner at Muzo, Boyaca, Colombia, the discovery locality.

Parisite forms transparent to translucent brownish yellow, orange to brown crystals. The occasional star stone has been known.
General Information
Chemical Formula
Ca(Nd,Ce,La)
 
2
(CO
 
3
)
 
3
F
 
2
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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Photos of natural/un-cut material from mindat.org
Physical Properties of Parisite
Mohs Hardness4.5
Walter Schumann, Gemstones of the world (2001)
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Specific Gravity4.33 to 4.42
Walter Schumann, Gemstones of the world (2001)
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Cleavage QualityDistinct
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
Optical Properties of Parisite
Refractive Index1.671 to 1.771
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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Optical CharacterUniaxial/+
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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Birefringence0.099 to 0.100
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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ChatoyancyAsteriated (6)
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
Colour
Colour (General)Yellow-brown, reddish
Walter Schumann, Gemstones of the world (2001)
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TransparencyTransparent
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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LustreVitreous
Walter Schumann, Gemstones of the world (2001)
Crystallography of Parisite
Crystal SystemTrigonal
Walter Schumann, Gemstones of the world (2001)
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HabitPseudohexagonal crystals
Michael O’Donoghue, Gems, Sixth Edition (2006)
Geological Environment
Where found:Occurs in carbonaceous shales including those hosting emeralds and as inclusions in the emeralds.
Michael O’Donoghue, Gems, Sixth Edition (2006)
Further Information
Mineral information:Parisite information at mindat.org
Significant Gem Localities
Colombia
 
  • Boyacá Department
    • Vasquez-Yacopí Mining District
      • Mun. de Muzo
Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 435
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