mineral
Hypersthene
Enstatite-Ferrosilite series, (Mg,Fe)2Si2O6
AI-generated identification · may be incorrectHardness: 5.5-6 on Mohs scale. Color: Dark brown, brownish-black, greyish black, or greenish black with a distinctive iridescent bronze-like or pearly sheen (schiller effect). Luster: Vitreous to sub-metallic, resinous. Crystal Structure: Orthorhombic. Cleavage: Good in two directions.
- Hardness
- 5
- Luster
- Vitreous to sub-metallic, resinous
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Physical properties
Hardness: 5.5-6 on Mohs scale. Color: Dark brown, brownish-black, greyish black, or greenish black with a distinctive iridescent bronze-like or pearly sheen (schiller effect). Luster: Vitreous to sub-metallic, resinous. Crystal Structure: Orthorhombic. Cleavage: Good in two directions.
Formation & geological history
Formed in mafic and ultramafic igneous rocks such as gabbro, norite, and basalt, as well as in high-grade metamorphic rocks and stone-iron meteorites.
Uses & applications
Used primarily as a gemstone, polished into cabochons or beads for jewelry, and as a decorative or healing crystal specimen for collectors.
Geological facts
The name Hypersthene is derived from the Greek words 'hyper' meaning 'above' and 'sthenos' meaning 'power' or 'strength', referring to its higher hardness compared to hornblende. It exhibits a famous silky schiller effect caused by micro-inclusions.
Field identification & locations
Identified by its dark, almost black color combined with a velvety, metallic sheen or schiller when tilted under bright light. Found commonly in Canada (Labrador), USA, Greenland, Norway, and Australia.
