Hypersthene

Physical Properties

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.

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.

Identified on: 4/24/2026

Mode: Standard