mineral

Peach Moonstone

Moonstone (KAlSi3O8)

Hardness: 6-6.5 on Mohs scale; Color: Peach, salmon, or tan with pearly to vitreous luster; Crystal structure: Monoclinic/Triclinic; Cleavage: Perfect in two directions; Specific Gravity: 2.55-2.63

Hardness: 6-6
Color: Peach, salmon, or tan with pearly to vitreous luster

Identified January 10, 2026More mineral →

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Physical properties

Hardness: 6-6.5 on Mohs scale; Color: Peach, salmon, or tan with pearly to vitreous luster; Crystal structure: Monoclinic/Triclinic; Cleavage: Perfect in two directions; Specific Gravity: 2.55-2.63

Formation & geological history

Formed in plutonic igneous rocks (granite and syenite) and pegmatites. It is a variety of feldspar (orthoclase/albite) that develops an adularescent effect through light scattering off microscopic lamellar intergrowths.

Uses & applications

Primarily used in jewelry (cabochons, beads, rings), ornamental carvings, and widely collected as a metaphysical or healing stone.

Geological facts

The peach variety is a softer, warmer hue of the traditional moonstone and is often associated with emotional balance. It exhibits an optical phenomenon called adularia (a billowy white/blue light) caused by light diffraction.

Field identification & locations

Identified by its distinctive pearly sheen and patchy or cloud-like internal structure. Commonly found in India, Sri Lanka, and Madagascar. Collectors look for stones with a consistent color and strong adularescence.