Cat's eye moonstone is the most well known variety of orthoclase feldspar. A colorless to yellowish gray, highly translucent to semi-transparent stone that reflects light in a distinctive shimmering phenomenon known as adularescence. This lovely sheen is due to a combination of orthoclase and albite arranged in layers. Light reflected from the layers if they are not too thick is responsible for the unusual optical properties.
What are the properties of cat's eye moonstone gemstones?
Moonstone is fairly soft (6-6.5 on the Mohs scale). Moonstone comes from Sri Lanka, India, Madagascar, Burma, Tanzania and the USA.
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