Hübnerite
Peru
12.65 carats
© raregemhunter
Hübnerite forms transparent to translucent prismatic yellowish brown to reddish brown crystals. The crystals are typically flattened and occur with fine striations in the direction of elongation.
Deep blood-red internal reflections combined with the metallic-adamantine-resinous lustre make this gem very attractive.
Hübnerite 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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Hübnerite Gemstones by Size
This table shows distribution of Hübnerite 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:0.98 cts
Heaviest:12.65 cts
Average:5.67 cts
Total photos:3
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| General Information | ||||||||||
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| Other Names/Trade Names: | ||||||||||
| Chemical Formula |
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| Physical Properties of Hübnerite | ||||||||||
| Mohs Hardness | 4 to 4.5, Gems, Sixth Edition (2006) | |||||||||
| Specific Gravity | 7.12 to 7.18, Gems, Sixth Edition (2006) | |||||||||
| Tenacity | Brittle, Handbook of mineralogy (2001) | |||||||||
| Cleavage Quality | Perfect, Gems, Sixth Edition (2006) | |||||||||
| Fracture | Uneven, Handbook of mineralogy (2001) | |||||||||
| Optical Properties of Hübnerite | ||||||||||
| Refractive Index | 2.17 to 2.32, Gems, Sixth Edition (2006) The RI for the alpha, beta and gamma rays is 2.17–2.20, 2.22 and 2.30–2.32 | |||||||||
| Optical Character | Biaxial/+, Gems, Sixth Edition (2006) | |||||||||
| Birefringence | 0.13, Gems, Sixth Edition (2006) | |||||||||
| Pleochroism | Perceptible: yellow to green, red-orange - yellowish brown to greenish yellow, red-orange to red - green; brick-red to red, Handbook of mineralogy (2001) | |||||||||
| Colour | ||||||||||
| Colour (General) | Yellowish brown to reddish brown, Gems, Sixth Edition (2006) More from other references | |||||||||
| Transparency | Transparent,Translucent, Gems, Sixth Edition (2006) | |||||||||
| Lustre | Adamantine,Resinous,Metallic, Gems, Sixth Edition (2006) | |||||||||
| Crystallography of Hübnerite | ||||||||||
| Crystal System | Monoclinic, Gems, Sixth Edition (2006) | |||||||||
| Habit | Prismatic, Gems, Sixth Edition (2006) More from other references | |||||||||
| Geological Environment | ||||||||||
| Where found: | Typical of high-temperature hydrothermal vein deposits and pneumatolytically altered granites yielding greisen; in granite pegmatites; also in alluvial and eluvial deposits., Handbook of mineralogy (2001) | |||||||||
| Further Information | ||||||||||
| Mineral information: | Hübnerite information at mindat.org | |||||||||
| Significant Gem Localities | ||||||||||
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