mineral

Sunstone

(Ca,Na)((Al,Si)2Si2O8) - Plagioclase Feldspar

AI-generated identification · may be incorrect

Hardness: 6-6.5 (Mohs), Color: Orange, reddish-brown, or gold with metallic flashes, Luster: Vitreous to pearly, Crystal Structure: Triclinic, Specific Gravity: 2.62-2.72

Hardness: 6-6

Identified June 8, 2026More mineral →

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Physical properties

Hardness: 6-6.5 (Mohs), Color: Orange, reddish-brown, or gold with metallic flashes, Luster: Vitreous to pearly, Crystal Structure: Triclinic, Specific Gravity: 2.62-2.72

Formation & geological history

Formed in igneous environments, specifically molten lava (basaltic flows), where it crystallizes as cooling occurs. The signature metallic schiller is caused by inclusions of hematite or copper.

Uses & applications

Primarily used in jewelry as cabochons or faceted gemstones. Also popular as a healing crystal among collectors and metaphysical practitioners.

Geological facts

Oregon Sunstone is the official state gemstone of Oregon, USA, and is unique because its inclusions are made of pure copper, unlike sunstones from other regions.

Field identification & locations

Identify by rotating under light to observe 'aventurescence' (metallic flashes). It is commonly found in India, Norway, Canada, and the United States (Oregon).