Skardu Area, Gilgit-Baltistan, Pakistan
0.22 carats
© Rarestone.com
General Information | ||||||||||||||||||
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Chemical Formula |
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Physical Properties of Clinozoisite | ||||||||||||||||||
Mohs Hardness | 6 to 7Gemstones of the world (2001) , | |||||||||||||||||
Specific Gravity | 3.21 to 3.38Gems, Sixth Edition (2006) , | |||||||||||||||||
Cleavage Quality | PerfectGems, Sixth Edition (2006) , | |||||||||||||||||
Optical Properties of Clinozoisite | ||||||||||||||||||
Refractive Index | 1.670 to 1.734Gems, Sixth Edition (2006) , RI for the alpha, beta and gamma rays is 1.670–1.715, 1.675–1.725 and 1.690–1.734 | |||||||||||||||||
Optical Character | Biaxial/+Gems, Sixth Edition (2006) , | |||||||||||||||||
Birefringence | 0.005 to 0.015Gems, Sixth Edition (2006) , | |||||||||||||||||
Colour | ||||||||||||||||||
Colour (General) | Yellow to yellow-brown, colourless, greenish, pink.Gemstones of the world (2001) , More from other references | |||||||||||||||||
Causes of Colour | Green (tawmawite), Cr3+ in octahedral coordinationPragmatic Spectroscopy For Gemologists (2011) , | |||||||||||||||||
Transparency | Transparent,TranslucentGemstones of the world (2001) , More from other references | |||||||||||||||||
Lustre | VitreousGemstones of the world (2001) , | |||||||||||||||||
Crystallography of Clinozoisite | ||||||||||||||||||
Crystal System | MonoclinicGems, Sixth Edition (2006) , | |||||||||||||||||
Habit | Elongated prismatic crystalsGems, Sixth Edition (2006) , | |||||||||||||||||
Geological Environment | ||||||||||||||||||
Where found: | Typically in low- to medium-grade regionally metamorphosed igneous and sedimentary rocks, as well as in contact metamorphosed calcium-rich sediments; an alteration product of plagioclase feldspars (saussuritization).Handbook of Mineralogy (2001) , | |||||||||||||||||
Further Information | ||||||||||||||||||
Mineral information: | Clinozoisite information at mindat.org |