cummingtonite

[ kuhm-ing-tuh-nahyt ]
/ ˈkʌm ɪŋ təˌnaɪt /

noun

an amphibole mineral, magnesium-iron silicate, similar in composition to anthophyllite but richer in iron.

Origin of cummingtonite

named after Cummington, Mass., where it is found; see -ite1

Words nearby cummingtonite