Moonstone Moonstone is the most well known variety of orthoclase feldspar. A colorless to yellowish gray, highly translucent to semitransparent 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. 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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Many beautiful gems on the site. Love that you are actually shipped the gem that is shown in the photos. Also cool that they give a write up of each gem detailing hardness, characteristics, and best uses for mounting. Great site! Looking forward to seeing these gems in person.