The name given (with or without distinguishing adjunct) to several highly valued precious stones. According to King, Antique Gems 26, given by…

An olive-green, grey-green, or brown orthorhombic silicate of magnesium and iron which is a common mineral in basic igneous rocks. Also: (a member…

A name formerly given to several different gems of a green colour, such as zircon, tourmaline, topaz, and apatite. Since about 1790 restricted to…

a very ferruginous variety of chrysolite, occurring in large glassy crystals.

A pale-green variety of chrysolite.

A fibrous kind of chrysolite of a greenish colour; the ἀμίαντος of Dioscorides.

A reddish variety of olivine containing some titanium instead of silicon.

Any of a group of plutonic rocks which contain little or no feldspar but substantial olivine (usually with pyroxene or other mafic minerals) and…

A manganese-rich variety of chrysolite.

A red-brown to orange-brown silicate mineral of variable composition which is formed as an alteration product of olivine within igneous rocks.