mineral

Peach Moonstone

Potassium Aluminum Silicate (KAlSi3O8)

Hardness: 6-6.5 Mohs. Color: Peach, salmon, or orange. Luster: Vitreous to pearly. Crystal structure: Monoclinic/Triclinic. Cleavage: Perfect in two directions. Specific gravity: 2.56-2.59. Exhibits a soft adularescent glow.

Hardness: 6-6
Color: Peach, salmon, or orange
Luster: Vitreous to pearly

Identified March 5, 2026More mineral →

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Physical properties

Formation & geological history

Formed through the cooling of igneous rock deep within the Earth. The distinct colors and glow are caused by alternating layers of orthoclase and albite minerals that scatter light as the rock cools over millions of years.

Uses & applications

Primarily used in jewelry making (cabs, beads, pendants), meditation practices, and as a popular specimen for crystal collecting.

Geological facts

The peach hue is typically caused by inclusions of iron or goethite. Moonstones have been used in jewelry for thousands of years, notably by ancient Romans and during the Art Nouveau period.

Field identification & locations

Identify by its characteristic 'sheen' and peach-to-pinkish hue. It is commonly found in Sri Lanka, India, and Tanzania. Look for the pearly luster and smooth, rounded water-worn surfaces if found in nature.

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