mineral

Raw Sunstone

Sunstone (Feldspar variety, (Ca,Na)((Al,Si)2Si2O8))

AI-generated identification · may be incorrect

Hardness: 6-6.5 (Mohs), Color: Orange-brown with metallic 'schiller' flash, Luster: Vitreous to pearly, Crystal structure: Triclinic, Specific gravity: 2.62-2.67

Hardness: 6-6

Identified July 20, 2026More mineral →

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Physical properties

Hardness: 6-6.5 (Mohs), Color: Orange-brown with metallic 'schiller' flash, Luster: Vitreous to pearly, Crystal structure: Triclinic, Specific gravity: 2.62-2.67

Formation & geological history

Forms in igneous rocks like basalt or rhyolite and in pegmatites. The aventurescence is caused by tiny inclusions of copper or hematite plates. Significant deposits range from Cenozoic to older geological periods.

Uses & applications

Primarily used as a gemstone in jewelry (cabochons, beads, or faceted stones) and as a collector's mineral specimen.

Geological facts

Oregon Sunstone is the official state gemstone of Oregon, USA, and is unique because its metallic 'schiller' effect is caused by inclusions of pure copper.

Field identification & locations

Identify in the field by its distinct orange-to-gold metallic shimmer when tilted under light. Found in Oregon (USA), Norway, India, and Tanzania. Look for it in weathered basaltic flows.