mineral

Sunstone

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

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 →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

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).

Other mineral specimens

See all

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