mineral

Peach Moonstone

Anorthoclase or Orthoclase Feldspar (K,Na)AlSi3O8

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

Hardness: 6-6

Identified May 29, 2026More mineral →

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Physical properties

Hardness: 6-6.5 (Mohs), Color: Peach, salmon, cream to 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 plutonic and metamorphic rocks. Most peach moonstones are alkaline feldspars that crystallized from cooling magma and developed an internal layered structure through exsolution during cooling.

Uses & applications

Primarily used in jewelry (cabs, beads, pendants), as a tumbled pocket stone, and in metaphysical/spiritual collections.

Geological facts

Peach moonstone exhibits a special optical phenomenon called adularescence, which is a soft glow or sheen that appears to move across the stone when it is rotated, often caused by light scattering between layers of albite and orthoclase.

Field identification & locations

Identified in the field by its distinct pearly sheen, soft peach color, and two planes of cleavage. Commonly found in Madagascar, Sri Lanka, and parts of India. Collectors should look for a strong, moving sheen and high translucency.

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Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

Epidote

Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

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Nephrite Jade

Nephrite

Mineral/Rock

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety often found as a river rock)

Metamorphic Rock

Biotite Schist

Biotite-rich Schist [K(Mg,Fe)3AlSi3O10(F,OH)2]

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Green Apatite on Albite

Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]

mineral