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1. (n.) moonstone
a semitransparent or translucent, opalescent, pearly blue variety of adularia, used as a gem.
2. moonstone
any opalescent feldspar, as certain varieties of albite, labradorite, or oligoclase, used as gems.
Etymology: (1625–35)
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| Definition of 'moonstone' |
Princeton's WordNet |
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1. (noun) moonstone
a transparent or translucent gemstone with a pearly luster; some specimens are orthoclase feldspar and others are plagioclase feldspar
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| Definition of 'moonstone' |
Webster Dictionary |
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1. (noun) moonstone
a nearly pellucid variety of feldspar, showing pearly or opaline reflections from within. It is used as a gem. The best specimens come from Ceylon
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