tremolite
noun
- calcium and magnesium-rich amphibole mineral
Wiktionary
noun
Etymology: From Tremola San Gottardo in Switzerland, where found, + -ite.
- A pale grey/green amphibole mineral, a type of asbestos, that is a mixed calcium and magnesium silicate, with the chemical formula Ca₂Mg₅Si₈O₂₂(OH)₂; sometimes used in place of common asbestos.