Norbergite
Norbergite is named after its discovery locality at Norberg, Sweden.
Norbergite forms translucent to opaque, tan, yellow, yellow-orange, orange-brown, pink with purplish tint, white granular masses. Transparent crystals are very rare.
Norbergite is often cut into cabochons.
Norbergite forms translucent to opaque, tan, yellow, yellow-orange, orange-brown, pink with purplish tint, white granular masses. Transparent crystals are very rare.
Norbergite is often cut into cabochons.
| General Information | ||||||||||||||
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| Chemical Formula |
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| Physical Properties of Norbergite | ||||||||||||||
| Mohs Hardness | 6 to 6.5, Handbook of Mineralogy (2001) | |||||||||||||
| Specific Gravity | 3.177, Handbook of Mineralogy (2001) | |||||||||||||
| Tenacity | Brittle, Handbook of Mineralogy (2001) | |||||||||||||
| Fracture | Uneven,Sub-Conchoidal, Handbook of Mineralogy (2001) | |||||||||||||
| Optical Properties of Norbergite | ||||||||||||||
| Refractive Index | 1.563 to 1.593, Handbook of Mineralogy (2001) | |||||||||||||
| Optical Character | Biaxial/+, Handbook of Mineralogy (2001) | |||||||||||||
| Pleochroism | Pale yellow - very pale yellow - colorless, Handbook of Mineralogy (2001) | |||||||||||||
| Colour | ||||||||||||||
| Colour (General) | Tan, yellow, yellow-orange, orange-brown, pink with purplish tint, white; in thin section, pale yellow to colorless, Handbook of Mineralogy (2001) | |||||||||||||
| Transparency | Transparent,Translucent, Handbook of Mineralogy (2001) | |||||||||||||
| Lustre | Vitreous,Resinous, Handbook of Mineralogy (2001) | |||||||||||||
| Fluorescence & other light emissions | ||||||||||||||
| Fluorescence (Short Wave UV) | May fluoresce canary-yellow, Handbook of Mineralogy (2001) | |||||||||||||
| Crystallography of Norbergite | ||||||||||||||
| Crystal System | Orthorhombic, Handbook of Mineralogy (2001) | |||||||||||||
| Habit | Crystals rare, to 2.5 cm, thick tabular, typically rounded and highly modified; granular., Handbook of Mineralogy (2001) | |||||||||||||
| Geological Environment | ||||||||||||||
| Where found: | In contact metamorphic zones in limestones and dolostones into which plutonic rocks or pegmatites have introduced fluorine., Handbook of Mineralogy (2001) | |||||||||||||
| Further Information | ||||||||||||||
| Mineral information: | Norbergite information at mindat.org | |||||||||||||
| Significant Gem Localities | ||||||||||||||
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