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amphibole
Any of a large group of structurally similar hydrated double silicate minerals, such as hornblende, containing various combinations of sodium, calcium, magnesium, iron, and aluminum.
Word Entries at Get Words: “amphibole
amphibole
Ferromagnesian silicate mineral, common constituent of igneous and metamorphic rocks.
This entry is located in the following unit: Geology or Related Geological Terms + (page 3)