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Definition of Moonstone
1. Noun. A transparent or translucent gemstone with a pearly luster; some specimens are orthoclase feldspar and others are plagioclase feldspar.
Definition of Moonstone
1. n. 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.
Definition of Moonstone
1. Noun. (minerology) A translucent gemstone, an orthoclase feldspar, that has a pearly lustre. ¹
¹ Source: wiktionary.com
Definition of Moonstone
1. [n -S]
Medical Definition of Moonstone
1.