mineral

Peach Moonstone (Orange/Peach Feldspar)

Potassium aluminum silicate (KAlSi3O8)

Hardness: 6-6.5 on Mohs scale; Color: Pinkish-orange, peach, or light tan; Luster: Pearly to sub-vitreous; Crystal Structure: Monoclinic; Cleavage: Two directions at 90 degrees; Specific Gravity: 2.56-2.59.

Hardness: 6-6
Color: Pinkish-orange, peach, or light tan
Luster: Pearly to sub-vitreous

Identified April 13, 2026More mineral →

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Physical properties

Formation & geological history

Formed in igneous or metamorphic environments through the cooling of magma. The characteristic 'glow' or sheen is due to alternating layers of orthoclase and albite feldspar that scatter light.

Uses & applications

Predominantly used as a gemstone in jewelry (cabochons and beads) and highly valued in the metaphysical and crystal collecting communities.

Geological facts

Natural moonstone exhibits a phenomenon called adularescence, which creates a soft glow from within the stone. Peach varieties are often associated with emotional soothing in folklore.

Field identification & locations

Identify in the field by its distinct pearly sheen and hardness (it can scratch glass but is softer than quartz). Commonly found in Sri Lanka, India, and Tanzania. Collectors should look for a uniform peach color and a smooth surface without deep cracks.

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Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

Schist

Metamorphic

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

Green Apatite on Albite

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

mineral