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datolite
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nesosilicate
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datolite
datolite

datolite

mineral
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History

datolite, an uncommon mineral, calcium borosilicate, CaBSiO4(OH), that occurs as white or colourless veins and cavity linings in basic igneous rocks and in metallic-ore veins. Some notable deposits exist in the United States: Westfield, Mass.; Bergen Hill, N.J.; and the Lake Superior copper district. Others have been found in Norway, various places in Italy, and Tasmania. For detailed physical properties, see silicate mineral (table).

This article was most recently revised and updated by Amy Tikkanen.