mineral

Sunstone

Plagioclase Feldspar ((Ca,Na)(Al,Si)4O8)

AI-generated identification · may be incorrect

Hardness: 6-6.5 (Mohs scale), Color: Orange, golden, reddish-brown with shimmering inclusions, Luster: Vitreous to pearly, Crystal structure: Triclinic, Cleavage: Perfect in two directions, Specific Gravity: 2.62-2.67

Hardness: 6-6

Identified April 4, 2026More mineral →

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Physical properties

Formation & geological history

Formed in cooling lava flows (basalt) or in metamorphic environments. The shimmer (aventurescence) is caused by tiny inclusions of copper or hematite plates that reflect light as the crystal grows.

Uses & applications

Primarily used as a gemstone in jewelry (rings, pendants, earrings) and as a pocket stone for collectors and metaphysical practitioners.

Geological facts

Oregon Sunstone is the official state gemstone of Oregon and is unique because its aventurescence is caused by microscopic inclusions of native copper rather than hematite.

Field identification & locations

Identify by its characteristic metallic shimmer when tilted under a light source. Found commonly in Oregon (USA), Norway, Tanzania, India, and Canada. Look for feldspar-type cleavage and distinct orange-gold speckles.