mineral
Moonstone
Feldspar (Orthoclase/Albite), (Na,K)AlSi3O8
AI-generated identification · may be incorrectHardness 6 on Mohs scale, pearly luster, translucent to opaque with adularescence showing a floating blue or white sheen, monoclinic crystal system.
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Physical properties
Hardness 6 on Mohs scale, pearly luster, translucent to opaque with adularescence showing a floating blue or white sheen, monoclinic crystal system.
Formation & geological history
Forms in igneous rocks like pegmatites and granites, as well as in hydrothermal veins through the exsolution of albite and orthoclase.
Uses & applications
Widely used in gemstone jewelry, cabochons, and ornamental carvings.
Geological facts
Moonstone is strongly associated with lunar deities in various cultures and exhibits a unique optical phenomenon called adularescence caused by light scattering.
Field identification & locations
Identified by its characteristic billowy light reflection and cleavage angles; commonly sourced from Sri Lanka, India, and Madagascar.
