Cummingtonite: (′kÉ™m ·iÅ‹ ·tə′nÄ«t) A basic silicate of magnesium and ferrous iron, (Mg, Fe)7Si8O22(OH)2, that is an amphibole mineral similar to anthophyllite but monoclinic and with more iron, and that [...]
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Cummingtonite: (′kÉ™m ·iÅ‹ ·tə′nÄ«t) A basic silicate of magnesium and ferrous iron, (Mg, Fe)7Si8O22(OH)2, that is an amphibole mineral similar to anthophyllite but monoclinic and with more iron, and that [...]