mineral

Peach Moonstone

Orthoclase (Potassium Aluminum Silicate, KAlSi3O8)

AI-generated identification · may be incorrect

Hardness: 6-6.5 (Mohs scale), Color: Peach, salmon, or pinkish-tan, Luster: Vitreous to pearly, Crystal Structure: Monoclinic, Cleavage: Two directions at 90 degrees, Specific Gravity: 2.56-2.59

Hardness: 6-6

Identified June 30, 2026More mineral →

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Physical properties

Hardness: 6-6.5 (Mohs scale), Color: Peach, salmon, or pinkish-tan, Luster: Vitreous to pearly, Crystal Structure: Monoclinic, Cleavage: Two directions at 90 degrees, Specific Gravity: 2.56-2.59

Formation & geological history

Formed in igneous and metamorphic environments, specifically pegmatites. It gains its distinctive sheen (adularescence) from the intergrowth of orthoclase and albite layers that scatter light.

Uses & applications

Predominantly used as a gemstone in jewelry (cabochons, beads) and highly valued in crystal healing and mineral collecting.

Geological facts

Peach moonstone is a variety of Feldspar. The 'glow' seen in moonstones is called adularescence, which occurs due to light reflecting between microscopic alternating layers of different feldspar minerals.

Field identification & locations

Identify in the field by its pearly luster, distinct 90-degree cleavage, and soft peachy color. It is commonly found in Madagascar, India, Sri Lanka, and Myanmar.