Dundas mineral field, Zeehan mining district, West Coast municipality, Tasmania, Australia
4.09 carats
© Rarestone.com
General Information | |||||||||
---|---|---|---|---|---|---|---|---|---|
Chemical Formula |
| ||||||||
Physical Properties of Crocoite | |||||||||
Mohs Hardness | 2.5 to 3Gemmological Tables (2004) , More from other references | ||||||||
Specific Gravity | 5.90 to 6.10Gemmological Tables (2004) , More from other references | ||||||||
Cleavage Quality | DistinctGemstones (2009) , | ||||||||
Fracture | ConchoidalGemstones (2009) , | ||||||||
Optical Properties of Crocoite | |||||||||
Refractive Index | 2.31 to 2.66Gemmological Tables (2004) , More from other references | ||||||||
Optical Character | Biaxial/+Gemmological Tables (2004) , More from other references | ||||||||
Birefringence | 0.35Gemmological Tables (2004) , More from other references | ||||||||
Pleochroism | Distinctly trichroicGemstones (2009) , | ||||||||
Dispersion | NilGemstones (2009) , | ||||||||
Colour | |||||||||
Colour (General) | Yellowish-red, orangeGemmological Tables (2004) , More from other references | ||||||||
Causes of Colour | Yellow to red, O2-→Cr6+ charge transferPragmatic Spectroscopy For Gemologists (2011) , | ||||||||
Transparency | Transparent,TranslucentGemmological Tables (2004) , More from other references | ||||||||
Lustre | Adamantine,VitreousGemstones (2009) , | ||||||||
Fluorescence & other light emissions | |||||||||
Fluorescence (General) | A reddish to dark-brown fluorescence may sometimes be seenGems, Sixth Edition (2006) , | ||||||||
Crystallography of Crocoite | |||||||||
Crystal System | MonoclinicGemmological Tables (2004) , More from other references | ||||||||
Habit | PrismaticGems, Sixth Edition (2006) , More from other references | ||||||||
Geological Environment | |||||||||
Where found: | It is found in the oxidized zone of lead deposits in association with chromium-bearing rocks.Gems, Sixth Edition (2006) , | ||||||||
Further Information | |||||||||
Mineral information: | Crocoite information at mindat.org | ||||||||
Significant Gem Localities | |||||||||
|