Manganotantalite
Afghanistan
8.35 carats
© irocks.com
Manganotantalite is an intense red transparent material that is suitable for cutting into magnificent faceted gems.
Manganotantalite 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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Manganotantalite Gemstones by Size
This table shows distribution of Manganotantalite 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:0.74 cts
Heaviest:8.35 cts
Average:4.55 cts
Total photos:4
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| General Information | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A variety or type of: | Tantalite | |||||||||||
| Other Names/Trade Names: | ||||||||||||
| Chemical Formula |
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| Physical Properties of Manganotantalite | ||||||||||||
| Mohs Hardness | 5.5 to 6.5, Gemstones of the world (2001) More from other references | |||||||||||
| Specific Gravity | 7.73 to 7.97, Gemstones of the world (2001) More from other references | |||||||||||
| Cleavage Quality | Perfect, Gemmological Tables (2004) More from other references | |||||||||||
| Optical Properties of Manganotantalite | ||||||||||||
| Refractive Index | 2.19 to 2.34, Gemmological Tables (2004) More from other references | |||||||||||
| Optical Character | Biaxial/+, Gemmological Tables (2004) | |||||||||||
| Birefringence | 0.015, Gemmological Tables (2004) | |||||||||||
| Colour | ||||||||||||
| Colour (General) | Scarlet-red to dark red., Gemstones of the world (2001) More from other references | |||||||||||
| Transparency | Transparent, Gemstones of the world (2001) More from other references | |||||||||||
| Lustre | Vitreous, Gemstones of the world (2001) | |||||||||||
| Crystallography of Manganotantalite | ||||||||||||
| Crystal System | Orthorhombic, Gemmological Tables (2004) | |||||||||||
| Habit | Short prismatic crystals, Gems, Sixth edition (2006) | |||||||||||
| Geological Environment | ||||||||||||
| Where found: | Occurs in granite pegmatites., Gems, Sixth edition (2006) | |||||||||||
| Further Information | ||||||||||||
| Mineral information: | Manganotantalite information at mindat.org | |||||||||||
| Significant Gem Localities | ||||||||||||
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