Anhydrite
Simplon Railway tunnel (north section), Termen, Brig, Valais, Switzerland
3.89 carats
© Rarestone.com
Anhydrite Gemstones by Colour
This table shows the variety of hues this gemstone can be found in. Click on a photo for more information.
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Anhydrite Gemstones by Size
This table shows distribution of Anhydrite gemstone sizes that are listed on this site. This can give a good indication as to the general availability of this gemstone in different sizes.
Contributed photos
Lightest:2.30 cts
Heaviest:3.89 cts
Average:3.10 cts
Total photos:2
Do you have a larger Anhydrite? Why not upload a photo?
| General Information | |||||||||||||||||
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| Chemical Formula |
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| Physical Properties of Anhydrite | |||||||||||||||||
| Mohs Hardness | 3.5, Gemmological Tables (2004) More from other references | ||||||||||||||||
| Specific Gravity | 2.95 to 3.00, Gemmological Tables (2004) More from other references | ||||||||||||||||
| Cleavage Quality | Perfect, Gemmological Tables (2004) More from other references | ||||||||||||||||
| Fracture | Uneven, Gemstones (2009) | ||||||||||||||||
| Optical Properties of Anhydrite | |||||||||||||||||
| Refractive Index | 1.570 to 1.614, Gemmological Tables (2004) More from other references | ||||||||||||||||
| Optical Character | Biaxial/+, Gemmological Tables (2004) More from other references | ||||||||||||||||
| Birefringence | 0.044, Gemmological Tables (2004) More from other references | ||||||||||||||||
| Pleochroism | Weak, Gemstones (2009) | ||||||||||||||||
| Dispersion | 0.013, Gemstones (2009) | ||||||||||||||||
| Colour | |||||||||||||||||
| Colour (General) | White, pink, gray, Gemmological Tables (2004) More from other references | ||||||||||||||||
| Transparency | Transparent,Translucent, Gems, Sixth edition (2006) More from other references | ||||||||||||||||
| Lustre | Vitreous, Gemstones (2009) | ||||||||||||||||
| Fluorescence & other light emissions | |||||||||||||||||
| Fluorescence (Long-Wave UV) | Some German anhydrite may show a red fluorescence under LWUV., Gems, Sixth edition (2006) | ||||||||||||||||
| Crystallography of Anhydrite | |||||||||||||||||
| Crystal System | Orthorhombic, Gemmological Tables (2004) More from other references | ||||||||||||||||
| Habit | Tabular or equant crystals, Gems, Sixth edition (2006) More from other references | ||||||||||||||||
| Geological Environment | |||||||||||||||||
| Where found: | Is usually formed by the dehydration of gypsum, Gems, Sixth edition (2006) | ||||||||||||||||
| Further Information | |||||||||||||||||
| Mineral information: | Anhydrite information at mindat.org | ||||||||||||||||
| Significant Gem Localities | |||||||||||||||||
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