mineral

Peach Moonstone

Potassium Aluminum Silicate (KAlSi3O8) with inclusions

AI-generated identification · may be incorrect

Hardness: 6.0-6.5 on Mohs scale; Color: Peach, salmon, or orange-brown; Luster: Vitreous to pearly; Crystal structure: Monoclinic; Cleavage: Perfect in two directions; Specific gravity: 2.56-2.59

Hardness: 6
Color: Peach, salmon, or orange-brown
Luster: Vitreous to pearly

Identified July 10, 2026More mineral →

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Physical properties

Hardness: 6.0-6.5 on Mohs scale; Color: Peach, salmon, or orange-brown; Luster: Vitreous to pearly; Crystal structure: Monoclinic; Cleavage: Perfect in two directions; Specific gravity: 2.56-2.59

Formation & geological history

Formed in igneous and metamorphic rocks from the cooling of magma, where orthoclase and albite separate into alternating layers, creating the adularescence effect as light reflects between the layers.

Uses & applications

Primarily used as a gemstone in jewelry (cabochons, beads), for metaphysical practices, and by mineral collectors.

Geological facts

The 'glow' or shimmer seen in moonstone is called adularescence, which is caused by the interference of light through the internal microscopic layers of feldspar. It was highly popular during the Art Nouveau period.

Field identification & locations

Identified by its warm peach color and characteristic internal glow when rotated under light. Commonly found in Madagascar, Sri Lanka, and India. Collectors look for stones with a strong shimmer and minimal surface cracks.