mineral

Sunstone

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

AI-generated identification · may be incorrect

Hardness: 6-6.5 on the Mohs scale. Color: Peach, salmon pink, to reddish-brown. Luster: Vitreous to pearly. Crystal structure: Triclinic. Cleavage: Perfect in two directions.

Hardness: 6-6
Color: Peach, salmon pink, to reddish-brown
Luster: Vitreous to pearly

Identified July 10, 2026More mineral →

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Physical properties

Hardness: 6-6.5 on the Mohs scale. Color: Peach, salmon pink, to reddish-brown. Luster: Vitreous to pearly. Crystal structure: Triclinic. Cleavage: Perfect in two directions.

Formation & geological history

Formed in igneous rocks such as basalt or andesite and in pegmatites. The distinct shimmer, or aventurescence, is caused by inclusions of copper, hematite, or goethite. Found in Cenozoic volcanic flows.

Uses & applications

Mostly used as a gemstone for jewelry (beads, cabochons, faceted stones) and for metaphysical/collecting purposes.

Geological facts

Oregon Sunstone is the official state gemstone of Oregon. Rare varieties can exhibit a 'shiller' effect where microscopic metal platelets reflect light in a glittering metallic display.

Field identification & locations

Identify by its warm peachy-orange hue and the characteristic shimmering glitter under direct light. Often found in weathered volcanic areas and gravel beds.