mineral

Peach Moonstone

Potassium Aluminum Silicate (KAlSi3O8)

Hardness: 6-6.5 (Mohs), Color: Peach to orange-pink, Luster: Vitreous to pearly, Crystal structure: Monoclinic, Cleavage: Perfect in two directions, Specific gravity: 2.56-2.58

Hardness: 6-6

Identified May 25, 2026More mineral →

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Physical properties

Hardness: 6-6.5 (Mohs), Color: Peach to orange-pink, Luster: Vitreous to pearly, Crystal structure: Monoclinic, Cleavage: Perfect in two directions, Specific gravity: 2.56-2.58

Formation & geological history

Formed in igneous and metamorphic rocks through the cooling of silica-rich magma or the alteration of other feldspars. The peach color comes from fine inclusions of hematite or goethite.

Uses & applications

Primarily used as a gemstone for jewelry (cabochons, beads) and as a popular palm stone or decorative specimen for collectors and holistic practitioners.

Geological facts

Moonstone displays an optical phenomenon called adularescence, which is a soft glow that moves across the stone's surface, caused by the layering of orthoclase and albite feldspar.

Field identification & locations

Identified by its distinctive peachy color and the 'billowy' light reflectiveness. Commonly found in India, Madagascar, Sri Lanka, and parts of the United States. To identify in the field, look for its characteristic cleavage and pearly sheen.

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mineral