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Tag: Feldspathoid Minerals

Feldspathoid minerals are a group of tectosilicate minerals that resemble feldspar but have a different structure and a much lower silica content. They occur in rare and unusual magmatic rocks and are not found in rocks containing primary quartz.

Lazurite

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Sodalite

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Leucite-from-Vesuvius-Naples-Campania-Italy

Leucite

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Nepheline

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