antigorite

[ an-tig-uh-rahyt ]
/ ænˈtɪg əˌraɪt /

noun Mineralogy.

a variety of serpentine occurring in a brownish-green lamellar form.

Origin of antigorite

1860–65; named after Antigorio valley in N Italy where first found + -ite1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019