Rainbow Moonstone Moonstone owes its name to the white, almost magical shimmer that resembles moonshine. Bluish-white light glides over the surface when the stone is cut en cabochon. Gemologists call this phenomena adularescence, which originates from the interior structure of the gemstone in scales or lamellas. Incoming rays of light are refracted inside the stone and scattered, creating a unique play of light, which makes moonstone so special and coveted.
Moonstone is the most well-known potassium feldspar of the orthoclase species. A combination of orthoclase and albite arranged in layers cause the lovely sheen. Rainbow moonstone is another excellent variety of moonstone that adds multicolor to its mystical sheen and glow. Deposits were found in the late 1980s in India though supplies are not large. Moonstone is fairly soft, 6-6.5 on the Mohs scale, and sensitive to pressure. It is therefore most suitable for lovely pendants or brooches.
In Arab countries women reportedly sew moonstone into their garments, because it's considered a symbol of fertility.
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