Hercynite
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Physical & Optical Properties
Mohs Hardness
| Mohs | Reference mineral | Hercynite |
|---|---|---|
| 1 | Talc | |
| 2 | Gypsum | |
| 3 | Calcite | |
| 4 | Fluorite | |
| 5 | Apatite | |
| 6 | Orthoclase | |
| 7 | Quartz | |
| 8 | Topaz | ● |
| 9 | Corundum | |
| 10 | Diamond |
Crystal System
Value & Market
Where to Buy Hercynite
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About Hercynite
Hercynite is an iron aluminum spinel mineral, typically forming opaque to subtransparent dark green, black, or deep brown octahedral crystals with a vitreous to submetallic luster. It occurs in high-grade metamorphic rocks, basic and ultrabasic igneous rocks, and meteorites, with occurrences in Europe, Australia, and the USA. Transparent gem-quality material is extremely rare, and faceted hercynite is a significant collector's item due to its scarcity and unusual dark iron-rich composition.
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Jewelry Use
Suitable for daily wear