moonstone

Noun
  1. A transparent or translucent gemstone with a pearly luster;
    Some specimens are orthoclase feldspar and others are plagioclase feldspar (synset 114978961)
    is a type of:
    • feldspar, felspar - any of a group of hard crystalline minerals that consist of aluminum silicates of potassium or sodium or calcium or barium
    • transparent gem - a gemstone having the property of transmitting light without serious diffusion

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