Diaspore 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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Diaspore Gemstones by Size
This table shows distribution of Diaspore 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:1.18 cts
Heaviest:15.06 cts
Average:3.93 cts
Total photos:28
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| General Information | |||||||
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| Other Names/Trade Names: | |||||||
| Chemical Formula |
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| Physical Properties of Diaspore | |||||||
| Mohs Hardness | 6.5 to 7, Blue Chart Gem Identification (2010) More from other references | ||||||
| Specific Gravity | 3.30 to 3.40, Blue Chart Gem Identification (2010) More from other references | ||||||
| Cleavage Quality | Perfect, Blue Chart Gem Identification (2010) Perfect and easyMore from other references | ||||||
| Optical Properties of Diaspore | |||||||
| Refractive Index | 1.702 to 1.750, Blue Chart Gem Identification (2010) More from other references | ||||||
| Optical Character | Biaxial/+, Blue Chart Gem Identification (2010) More from other references | ||||||
| Birefringence | 0.048, Blue Chart Gem Identification (2010) DoublingMore from other references | ||||||
| Chatoyancy | Rare, Blue Chart Gem Identification (2010) | ||||||
| Colour | |||||||
| Colour (General) | Colourless, green, yellowish-brown, red, Gemmological Tables (2004) Colour change: greenish-brown/pink-brown | ||||||
| Colour (Daylight) | Greenish, Gems, Sixth Edition (2006) | ||||||
| Colour (Incandescent Light) | Pinkish brown under tungsten light, Gems, Sixth Edition (2006) | ||||||
| Transparency | Transparent, Gemmological Tables (2004) | ||||||
| Crystallography of Diaspore | |||||||
| Crystal System | Orthorhombic, Blue Chart Gem Identification (2010) More from other references | ||||||
| Habit | Platy crystals, Gems, Sixth Edition (2006) | ||||||
| Geological Environment | |||||||
| Where found: | Diaspore may be formed by the hydrothermal alteration of aluminous minerals and may be a hydrothermal mineral in some alkalic pegmatites., Gems, Sixth Edition (2006) | ||||||
| Further Information | |||||||
| Mineral information: | Diaspore information at mindat.org | ||||||
| Significant Gem Localities | |||||||
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