mineral
Peach Moonstone
Orthoclase (Potassium Aluminum Silicate, KAlSi3O8)
Hardness: 6-6.5 (Mohs scale), Color: Peach, salmon, or pinkish-tan, Luster: Vitreous to pearly, Crystal Structure: Monoclinic, Cleavage: Two directions at 90 degrees, Specific Gravity: 2.56-2.59
- Hardness
- 6-6
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Physical properties
Hardness: 6-6.5 (Mohs scale), Color: Peach, salmon, or pinkish-tan, Luster: Vitreous to pearly, Crystal Structure: Monoclinic, Cleavage: Two directions at 90 degrees, Specific Gravity: 2.56-2.59
Formation & geological history
Formed in igneous and metamorphic environments, specifically pegmatites. It gains its distinctive sheen (adularescence) from the intergrowth of orthoclase and albite layers that scatter light.
Uses & applications
Predominantly used as a gemstone in jewelry (cabochons, beads) and highly valued in crystal healing and mineral collecting.
Geological facts
Peach moonstone is a variety of Feldspar. The 'glow' seen in moonstones is called adularescence, which occurs due to light reflecting between microscopic alternating layers of different feldspar minerals.
Field identification & locations
Identify in the field by its pearly luster, distinct 90-degree cleavage, and soft peachy color. It is commonly found in Madagascar, India, Sri Lanka, and Myanmar.
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