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...
Stolzite Value
The International Gem Society (IGS) has a list of businesses offering gemstone appraisal services.
Stolzite Information
| Data | Value |
| Name | Stolzite |
| Is a Variety of | Scheelite |
| Crystallography | Tetragonal; crystals tabular and thick, or dipyramidal. Crystal faces commonly striated. |
| Colors | Brown, yellowish brown. fawn beige, tan, yellow red, red, greenish. |
| Luster | Resinous to subadamantine. |
| Hardness | 2.5-3. |
| Density | 7.9—8.34. |
| Birefringence | 0.08. |
| Cleavage | Lndistinct; fracture conchoidal to uneven; brittle. |
| 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. |
| Luminescence | None reported. |
| Spectral | Not diagnostic. |
| Formula | PbWO4. Dimorphous with Raspite. |
| Pleochroism | Not reported. |
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.
