riebeckite

[ree-be-kahyt]

noun

an amphibolic mineral, silicate of sodium and iron, occurring usually in feldspathoid rocks.

Origin of riebeckite

1885–90; named after Emil Riebeck (died 1885), German explorer; see -ite1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019