mineral

Hypersthene

Hypersthene (formula: (Mg,Fe)SiO3)

Hardness: 5.0–6.0 on the Mohs scale. Color: Dark brown, gray, or black with a distinct velvet-like metallic luster (labradorescence/schiller effect). Crystal structure: Orthorhombic. Cleavage: Perfect in two directions. Specific gravity: 3.4–3.9.

Hardness: 5

Identified April 10, 2026More mineral →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Formed in igneous and metamorphic rocks, particularly in deep-seated plutonic rocks like gabbro and norite. It is an orthopyroxene mineral that crystallizes from mafic or ultramafic magmas.

Uses & applications

Primarily used as a gemstone for jewelry (cabochons) and as a 'metaphysical' healing stone. It is also of great interest to mineral collectors and geologists studying rock formation.

Geological facts

Hypersthene is often called 'Velvet Labradorite' due to its shimmering optical effect. The name comes from the Greek words 'hyper' and 'sthenos,' meaning 'above strength,' referring to its greater hardness compared to hornblende.

Field identification & locations

Identify by its characteristic 'schiller' effect—a copper or silver-toned iridescence visible when the stone is turned in the light. Commonly found in Canada (Paul's Island), Norway, and the United States.