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Apophylite Quartz Crystal Cluster 40-80 mm

Apophylite Quartz Crystal Cluster 40-80 mm

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Apophyllite is a potassium-calcium fluoride-silicate mineral related structurally to the zeolite family of aluminosilicates. Like the zeolites, it has high water content, although apophyllite has no aluminum in its chemical composition, which is approximately represented by the formula Ca4KFSi8O20·8H2O.

Apophyllite-(NaF) is rare and found sparingly at only a few localities. Apophyllite almost always occurs together with zeolites, especially in traprock environments. Apophyllite appears very similar to zeolites and is sometimes even confused with them.

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