Sunstone with Moonstone (Peach Moonstone)

Physical Properties

Hardness: 6-6.5 on Mohs scale; Color: Peach, salmon-pink, or flesh tones; Luster: Vitreous to pearly; Crystal structure: Monoclinic; Cleavage: Two directions at 90 degrees; Specific Gravity: 2.56-2.59. It often displays adularescence (a glow) and 'schiller' or aventurescence from tiny inclusions.

Formation & Geological History

Formed in plutonic and metamorphic rocks through high-temperature crystallization. Most quality specimens come from pegmatites. The peach color and flash are due to exsolution lamellae of different feldspar layers during cooling.

Uses & Applications

Primarily used as a gemstone for jewelry, ornamental carvings, crystal healing, and as collector specimens in various polished forms like towers or spheres.

Geological Facts

Peach Moonstone is technically a variety of Orthoclase feldspar. While standard Moonstone is known for a blue glow, Peach Moonstone is loved for its warm color and more subtle, silvery sheen. It is often found in Madagascar alongside other feldspar varieties.

Field Identification & Locations

Identify in the field by its distinct 90-degree cleavage planes and pearly sheen on surfaces. Common locations include Madagascar, India, Tanzania, and Sri Lanka. For collectors, look for the 'flash' or internal light when tilting the stone.

Identified on: 4/29/2026

Mode: Standard