Anorthite
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Physical & Optical Properties
Mohs Hardness
Crystal System
Value & Market
Where to Buy Anorthite
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About Anorthite
Anorthite is the calcium-rich end member of the plagioclase feldspar series, forming colorless to white crystals primarily in calcium-rich igneous and metamorphic rocks. Gem-quality transparent anorthite is exceptionally rare, with faceted specimens sought exclusively by mineral collectors. Significantly, lunar samples returned by the Apollo missions consist largely of anorthite-rich rock (anorthosite), making it an important rock-forming mineral of our Moon.