mineral

Hypersthene

Hypersthene (Magnesium Iron Silicate - (Mg,Fe)SiO3)

Hardness: 5.0-6.0 on Mohs scale; Color: Blackish-brown, dark green, or gray with characteristic metallic luster known as 'schiller'; Luster: Vitreous to pearly/metallic; Crystal structure: Orthorhombic; Specific Gravity: 3.4-3.9.

Hardness: 5
Luster: Vitreous to pearly/metallic

Identified April 24, 2026More mineral →

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Physical properties

Formation & geological history

Formed in mafic and ultramafic igneous rocks such as gabbro and norite, as well as in some metamorphic rocks. It belongs to the pyroxene group.

Uses & applications

Primarily used as a gemstone for jewelry (cabochons) and as a metabolic/protective stone in metaphysical collecting circles. Also of interest to mineral collectors for its unique optical properties.

Geological facts

The name Hypersthene is derived from Greek, meaning 'over strength'. It is famous for its 'velvety' schiller effect, which is caused by minute inclusions of iron minerals that reflect light in a shimmering, iridescent way.

Field identification & locations

Identify by its play of light (schiller) when tilted under a light source, which looks like moving silver or copper flashes against a dark background. Often found in Canada, Norway, and the United States.

Other mineral specimens

See all

Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

Schist

Metamorphic

Epidote

Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

metamorphic

Nephrite Jade

Nephrite

Mineral/Rock

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety often found as a river rock)

Metamorphic Rock

Green Apatite on Albite

Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]

mineral