Mellite
Hungary
0.50 carats
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Mellite is an organic material, it forms transparent honey yellow or reddish prismatic or dipyramidal crystals or fine-grained masses.
Mellite can be polished and faceted into attractive gemstones.
Mellite 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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| General Information | ||||||||||||||||||
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| Chemical Formula |
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| Physical Properties of Mellite | ||||||||||||||||||
| Mohs Hardness | 2, Gemmological Tables (2004) More from other references | |||||||||||||||||
| Specific Gravity | 1.58 to 1.60, Gemmological Tables (2004) More from other references | |||||||||||||||||
| Tenacity | Sectile, Handbook of Mineralogy (2001) Slightly sectile | |||||||||||||||||
| Cleavage Quality | Indistinct, Handbook of Mineralogy (2001) | |||||||||||||||||
| Fracture | Conchoidal, Handbook of Mineralogy (2001) | |||||||||||||||||
| Optical Properties of Mellite | ||||||||||||||||||
| Refractive Index | 1.509 to 1.541, Gemmological Tables (2004) More from other references | |||||||||||||||||
| Optical Character | Uniaxial/-, Gemmological Tables (2004) More from other references | |||||||||||||||||
| Birefringence | 0.030, Gemmological Tables (2004) More from other references | |||||||||||||||||
| Pleochroism | Weak: yellowish brown - yellow, Handbook of Mineralogy (2001) | |||||||||||||||||
| Colour | ||||||||||||||||||
| Colour (General) | Yellow, Gemmological Tables (2004) More from other references | |||||||||||||||||
| Transparency | Transparent, Gemmological Tables (2004) More from other references | |||||||||||||||||
| Lustre | Vitreous,Resinous, Gems, Sixth Edition (2006) | |||||||||||||||||
| Fluorescence & other light emissions | ||||||||||||||||||
| Fluorescence (General) | Weak fluorescent effects may be seen., Gems, Sixth Edition (2006) More from other references | |||||||||||||||||
| Crystallography of Mellite | ||||||||||||||||||
| Crystal System | Tetragonal, Gemmological Tables (2004) More from other references | |||||||||||||||||
| Habit | Prismatic or dipyramidal crystals or masses, Gems, Sixth Edition (2006) More from other references | |||||||||||||||||
| Geological Environment | ||||||||||||||||||
| Where found: | Mellite is found in brown coal and/or lignite deposits., Gems, Sixth Edition (2006) More from other references | |||||||||||||||||
| Further Information | ||||||||||||||||||
| Mineral information: | Mellite information at mindat.org | |||||||||||||||||
| Significant Gem Localities | ||||||||||||||||||
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