Iron-bearing orthopyroxene with a distinctive coppery-red metallic sheen schiller . Common in mafic igneous rocks. Color: Dark brown to greenish black. Luster: Vitreous to submetallic. Streak: Gray to brownish. Cleavage: Good in two directions at 88°. Hardness: 5-6. Transparency: Translucent to opaque. Crystal system: Orthorhombic. Chemical formula: Mg,Fe SiO₃. Specific gravity: 3.4-3.5. Formation: Crystallizes from mafic to intermediate magmas; common in norites and some andesites. Common geological settings: Labrador, Norway, India, Germany; found in norites and charnockites. Common look-alikes and related entries: Augite, Enstatite, Hornblende.
These authoritative resources support category-level nomenclature, terminology, identification methods, and safety. When a specimen-specific safety warning appears, the public-health source listed here directly supports that precaution. They are not line-by-line citations for every other property on this entry, and natural specimens vary.
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GeoMiner
Last updated
2026-03-30T14:36:47.043165+00:00
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Published; not independently peer-reviewed
IMA–CNMNC List of Mineral Names — International Mineralogical Association. Official mineral-name, nomenclature, and classification records.
Mineral ID Key — Mineralogical Society of America. Physical-property identification methods, repeat-testing guidance, and limitations.
Iron-bearing orthopyroxene with a distinctive coppery-red metallic sheen schiller . Common in mafic igneous rocks.
How can you identify Hypersthene?
Compare several properties rather than relying on colour alone. This entry records colour: Dark brown to greenish black; lustre: Vitreous to submetallic; streak: Gray to brownish; Mohs hardness: 5-6; cleavage: Good in two directions at 88°; crystal system: Orthorhombic; transparency: Translucent to opaque. Confirm an important identification with additional field tests or qualified laboratory work.
How does Hypersthene form?
Crystallizes from mafic to intermediate magmas; common in norites and some andesites.
Where is Hypersthene commonly found?
Labrador, Norway, India, Germany; found in norites and charnockites.
What is Hypersthene commonly confused with?
Hypersthene may be confused with Augite, Enstatite, Hornblende. Compare multiple diagnostic properties because colour and surface appearance can overlap.
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