mineral

Sunstone

Feldspar (variety Oligoclase or Labradorite), (Ca,Na)(Al,Si)4O8

Hardness: 6-6.5 (Mohs scale), Color: Orange, reddish-brown, or yellow with metallic flashes, Luster: Vitreous to pearly, Crystal Structure: Triclinic, Cleavage: Perfect in two directions.

Hardness: 6-6

Identified May 30, 2026More mineral →

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Physical properties

Hardness: 6-6.5 (Mohs scale), Color: Orange, reddish-brown, or yellow with metallic flashes, Luster: Vitreous to pearly, Crystal Structure: Triclinic, Cleavage: Perfect in two directions.

Formation & geological history

Formed in molten lava (igneous) or through metamorphic processes. The characteristic sparkle, or aventurescence, is caused by tiny inclusions of copper, hematite, or goethite.

Uses & applications

Primarily used as a gemstone in jewelry (rings, pendants, earrings) and as a collector's mineral. Occasionally used in metaphysical practices.

Geological facts

Oregon Sunstone contains unique microscopic inclusions of copper and is the official state gemstone of Oregon, USA. The metallic glitter effect is known as 'aventurescence'.

Field identification & locations

Identified by its warm color and the unique metallic 'shiller' or sparkle when tilted in the light. Found in Oregon (USA), Norway, Tanzania, and India.

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Mineral/Rock

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Metamorphic Rock

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mineral