mineral

Peach Moonstone

Orthoclase Feldspar (KAlSi3O8) with inclusions

Hardness: 6–6.5 (Mohs scale); Color: Soft peach, pinkish-tan, or apricot; Luster: Vitreous to pearly; Crystal structure: Monoclinic; Cleavage: Perfect in two directions; Specific gravity: 2.5–2.6; Exhibits adularescence (a ghostly glow beneath the surface).

Hardness: 6–6
Color: Soft peach, pinkish-tan, or apricot
Luster: Vitreous to pearly

Identified April 27, 2026More mineral →

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Physical properties

Formation & geological history

Formed from cooling magma in deep-seated igneous environments, such as pegmatites. The characteristic 'glow' is caused by the intergrowth of two types of feldspar (orthoclase and albite) that separate as the mineral cools.

Uses & applications

Primarily used in jewelry (cabochons, beads, rings), ornamental carvings, and as a popular metaphysical or spiritual healing stone among collectors.

Geological facts

Moonstone was used in Roman jewelry for nearly 2,000 years, and it was a favorite of Art Nouveau jewelers like René Lalique. Peach moonstone is specifically associated with the 'divine feminine' in gemstone lore.

Field identification & locations

Identify by its characteristic internal glow (adularescence) that seems to move when the stone is tilted. It has a pearly sheen that distinguishes it from quartz. Commonly found in India, Madagascar, Sri Lanka, and Myanmar.

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Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

Schist

Metamorphic

Sandstone with Mineral Veining or Crust

Sedimentary Sandstone (mostly SiO2 with Fe2O3 tinting)

sedimentary

Potassium Feldspar (Orthoclase)

Orthoclase (KAlSi3O8)

mineral

Gypsum (variety Selenite or Alabaster)

Calcium sulfate dihydrate (CaSO4·2H2O)

Mineral

Nephrite Jade

Nephrite

Mineral/Rock