mineral

Peach Moonstone Sphere

Potassium Aluminum Silicate (KAlSi3O8)

Hardness: 6-6.5 (Mohs scale); Color: Peach, tan, or light brown; Luster: Pearly to vitreous; Crystal Structure: Monoclinic; Cleavage: Perfect in two directions; Specific Gravity: 2.56-2.59; Exhibits adularescence.

Hardness: 6-6
Color: Peach, tan, or light brown
Luster: Pearly to vitreous

Identified May 27, 2026More mineral →

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Physical properties

Formation & geological history

Formed from orthoclase and albite intergrowths during the cooling of igneous rocks (pegmatites) or metamorphic rocks. As they cool, the two minerals separate into stacked layers, creating the play of light.

Uses & applications

Primarily used in jewelry, as decorative collector spheres, and is highly popular in the metaphysical and holistic community for its aesthetic and symbolic value.

Geological facts

The shimmering effect, called adularescence, is caused by light scattering between microscopic layers of different feldspar minerals. Moonstone is the state gemstone of Florida, despite not being naturally found there (it was selected to honor the moon landings).

Field identification & locations

Identify by its distinctive silky, inner glow when rotated under light. Commonly found in Madagascar, India, and Sri Lanka. Collectors should look for a strong, centered 'glow' and minimal surface fractures.

Other mineral specimens

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Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

Epidote

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

metamorphic

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]

metamorphic

Green Apatite on Albite

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

mineral