mineral

Peach Moonstone

Potassium Aluminum Silicate (KAlSi3O8)

AI-generated identification · may be incorrect

Hardness: 6-6.5 (Mohs scale), Color: Peach, salmon, or peach-orange, Luster: Vitreous to pearly, Crystal structure: Monoclinic, Cleavage: Two directions at 90 degrees, Specific gravity: 2.56-2.59

Hardness: 6-6

Identified May 31, 2026More mineral →

Explore Peach Moonstone in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Hardness: 6-6.5 (Mohs scale), Color: Peach, salmon, or peach-orange, Luster: Vitreous to pearly, Crystal structure: Monoclinic, Cleavage: Two directions at 90 degrees, Specific gravity: 2.56-2.59

Formation & geological history

Formed through the cooling of acidic magma and the subsequent exsolution of orthoclase and albite layers in a lamellar structure, which creates the characteristic schiller effect.

Uses & applications

Primarily used in jewelry making, ornamental carvings, and by crystal collectors for its aesthetic and metaphysical properties.

Geological facts

The peach hue is typically caused by inclusions of hematite (iron oxide). It is part of the feldspar group, which is the most abundant mineral group in Earth's crust.

Field identification & locations

Identified by its distinctive schiller or adularescence (a glow beneath the surface). Commonly found in Sri Lanka, India, and Madagascar. In the field, look for its perfect right-angle cleavage and pearly sheen on fractures.