Poudretteite

Poudretteite

Faceted poudretteite, 0.51 ct, Mogok, Myanmar
General
Category Cyclosilicate
Formula
(repeating unit)		 KNa2B3Si12O30
Strunz classification 09.CM.05
Dana classification 63.02.01a.08
Identification
Color Colorless, Light pink
Crystal habit Roughly equant barrel-shaped prismatic crystals
Crystal system Hexagonal
Cleavage None
Fracture Conchoidal, splintery
Tenacity Brittle
Mohs scale hardness 5
Luster Vitreous (Glassy)
Streak White
Diaphaneity Transparent
Specific gravity 2.51
Optical properties Uniaxial +
Refractive index 1.511 to 1.532
Birefringence 0.021
Pleochroism Colorless to pink
References [1][2][3][4]

Poudretteite is an extremely rare mineral and gemstone that was first discovered as minute crystals in Mont St. Hilaire, Quebec, Canada, during the 1960s.[4] The mineral was named for the Poudrette family because they operated a quarry in the Mont St. Hilaire area where poudretteite was originally found.[5]

References

  1. ↑ http://webmineral.com/data/Poudretteite.shtml
  2. ↑ http://www.mindat.org/min-3272.html
  3. ↑ http://www.gemdat.org/gem-3272.html
  4. 1 2 http://gemologyproject.com/wiki/index.php?title=Poudretteite
  5. ↑ Multicolour - Poudretteite
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