Chrome Pyrope

Chrome Pyrope is a red chrome-bearing variety of Pyrope.
General Information
A variety or type of:Pyrope, which is a variety of Garnet Group
Chemical Formula
Mg
 
3
(Al,Cr)
 
2
(SiO
 
4
)
 
3
Gemdat.org, Management Team (2012)
Physical Properties of Chrome Pyrope
Mohs Hardness7 to 7.5
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Specific Gravity3.62 to 3.80
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
TenacityBrittle
Anthony et al, Handbook of mineralogy (2001)
Cleavage QualityNone
Arthur Thomas, Gemstones (2009)
FractureConchoidal
Arthur Thomas, Gemstones (2009)
Optical Properties of Chrome Pyrope
Refractive Index1.720 to 1.740
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Optical CharacterIsotropic
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Colour
Colour (General)Violet
Gemdat.org, Management Team (2012)
TransparencyTransparent
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
LustreVitreous
Arthur Thomas, Gemstones (2009)
Crystallography of Chrome Pyrope
Crystal SystemIsometric
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Further Information
Mineral information:Chrome Pyrope information at mindat.org
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