Rob Lavinsky, iRocks.com – CC-BY-SA-3.0 [CC-BY-SA-3.0], via Wikimedia Commons
Stolzite is a rare mineral; much rarer than wulfenite and usually occurs in very minute crystals. However, the Australian crystals may be up to 1 inch…
Rob Lavinsky, iRocks.com – CC-BY-SA-3.0 [CC-BY-SA-3.0], via Wikimedia Commons
Stolzite is a rare mineral; much rarer than wulfenite and usually occurs in very minute crystals. However, the Australian crystals may be up to 1 inch…
Data | Value |
---|---|
Name | Stolzite |
Stone Sizes | Stolzite is a rare mineral (much rarer than wulfenite and usually occurs in very minute crystals. However, the Australian crystals may be up to 1 inch in size and tiny transparent areas have yielded very small cut stones of a bright orange color. |
Formula | PbWO4. Dimorphous with Raspite. |
Colors | Brown, yellowish brown, fawn beige, tan, yellow red, red, greenish. |
Fracture | Conchoidal to uneven |
Hardness | 2.5-3 |
Cleavage | Indistinct |
Crystallography | Tetragonal; crystals tabular and thick, or dipyramidal. Crystal faces commonly striated. |
Crystallographic Forms | |
Refractive Index | 2.19-2.27 |
Birefringence | 0.08 |
Luminescence | None reported. |
Luminescence Present | No |
Absorption Spectrum | Not diagnostic. |
Pleochroism | Not reported. |
Optics | o = 2.27; e = 2.19. Uniaxial (-). |
Optic Sign | Uniaxial - |
Luster | Resinous to subadamantine. |
Specific Gravity | 7.9-8.34 |
Transparency | Transparent to translucent. |
Optics: 0 I 2.27; e : 2.19.
Uniaxial (—).
Occurrence: A secondary mineral in the oxidation zone of tungsten-bearing ore deposits.
Broken Hill, New South Wales, Australia.
Brazil; England; Sardinia: Germany; Nigeria.
Utah; Arizona; Massachusetts; Pennsvlvania.
Name: After Dr. Stolz of Bohemia who first called attention to the mineral.