mineral

Peach Moonstone

Orthoclase Feldspar (KAlSi3O8) with inclusions

Hardness: 6-6.5 on Mohs scale; Color: peach, tan, flesh-colored; Luster: Pearly to Vitreous; Crystal Structure: Monoclinic; Cleavage: Two directions at 90 degrees; Specific Gravity: 2.56-2.59; Optical Property: Adularescence (soft glow).

Hardness: 6-6
Color: peach, tan, flesh-colored
Luster: Pearly to Vitreous

Identified February 24, 2026More mineral →

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Physical properties

Formation & geological history

Formed in plutonic igneous rocks and pegmatites through the slow cooling of magma. As the magma cools, orthoclase and albite separate into alternating layers, causing the gemstone's characteristic glow. Most specimens are from the Phanerozoic eon.

Uses & applications

Primarily used as a gemstone for jewelry (cabochons, beads), decorative carvings, pocket stones, and in metaphysical or holistic collecting.

Geological facts

The name 'moonstone' comes from its visual resemblance to the moonlight shining through clouds, a phenomenon known as adularescence. It is one of the birthstones for June.

Field identification & locations

Identify by its characteristic soft, milky sheen that seems to float just below the surface when rotated. Commonly found in Sri Lanka, India, Madagascar, and Myanmar. In the field, look for feldspar cleavage and the unique peach hue.

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