mineral

Sunstone

Andesine-Labradorite Feldspar ((Ca,Na)(Al,Si)4O8)

Hardness: 6-6.5 on Mohs scale; Color: Orange, reddish-brown, or gold; Luster: Vitreous to pearly; Crystal structure: Triclinic; Cleavage: Perfect in two directions; Specific gravity: 2.62-2.67; Distinguished by aventurescence (metallic glitter).

Hardness: 6-6
Color: Orange, reddish-brown, or gold
Luster: Vitreous to pearly

Identified May 31, 2026More mineral →

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Physical properties

Formation & geological history

Formed in igneous environments, specifically within basaltic lava flows and pegmatites. The characteristic glitter is caused by tiny plate-like inclusions of hematite, goethite, or copper metal.

Uses & applications

Primarily used as a gemstone in jewelry (rings, pendants, earrings), and as a popular specimen for mineral collectors and metaphysical practitioners.

Geological facts

The metallic 'schiller' effect or aventurescence is the most defining feature. Oregon Sunstone is unique in that its inclusions are made of pure copper, often leading to a wide variety of colors including green and bicolor specimens.

Field identification & locations

Identify by rotating under light to observe the metallic flash or 'glitter' within the stone. Found commonly in Oregon (USA), Norway, Tanzania, and India. Collectors look for clarity and the intensity of the schiller effect.

Other mineral specimens

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Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

Schist

Metamorphic

Epidote

Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

metamorphic

Nephrite Jade

Nephrite

Mineral/Rock

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety often found as a river rock)

Metamorphic Rock

Biotite Schist

Biotite-rich Schist [K(Mg,Fe)3AlSi3O10(F,OH)2]

metamorphic