Description
Rainbow Moonstone free form, polished on one side. This piece has a blue ‘flash’ on the polished side. Rainbow Moonstone is combination of orthoclase feldspar and albite, a plagioclase feldspar. The ‘flash’ you see, or the labradorescence, is caused by the scattering of light between microscopic layers of albite within the stone.
Moonstone is mostly milky white, sometimes with clear areas, and some pieces exhibit a bluey chatoyancy or labradorescence.
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