翠榴石; 鈣鐵榴石
Demantoid \De*man"toid\, n. [G. demant diamond + -oid.] (Min.) A yellow-green, transparent variety of garnet found in the Urals. It is valued as a gem because of its brilliancy of luster, whence the name.
demantoid n : a green andradite used as a gemstone