India's moonstones show cloudlike plays of light and color which are very valuable including beige brown, green, orange or simple brown.Rarer colors include blue, peach, smoke, champagne, black and red.The most important moonstone deposits are from Sri Lanka and India.Other notable sources include Australia, Brazil, Germany, India, Myanmar (Burma), Madagascar, Mexico, Norway, Switzerland, Tanzania, and the United States.With moonstone, the aura of light actually appears to glow from deep within the surface of the stone.World-Famous Moonstone Moonstone was extremely popular in the times of "Art Nouveau", which took place more than 100 years ago.
Some highly transparent stones may be faceted, but faceted moonstone is extremely rare.
Moonstone is a potassium aluminum silicate and can be easily identified by composition.
Many similar materials, such as labradorite, are actually plagioclase feldspar, whereas moonstone is by composition a potassium feldspar.
Moonstone - History and Introduction Moonstone is the most well-known gemstone variety of orthoclase feldspar, a potassium aluminum silicate.
It is a transparent to opaque oligoclase, a variety of plagioclase albite and sheet mica.