- a brown or yellow-green olivine found in igneous and metamorphic rocks and used as a gemstone
- Originally, any of various green-coloured gems; later specifically olivine
- [Rev.21:20] a gem stone w/prevelant color some shade of green.
- an olive-green, translucent mineral, called peridot when used as a semiprecious stone
- is a synonym of Olivine (i.e. contains half Forsterite and half Fayalite and may also refer to any Olivine that is yellow-green in color. The name is incorrectly used in describing two minerals: Chrysotile and sometimes in the gem trade to describe yellow, transparent Chrysoberyl.
- A stone preventive of fever and madness, which also disposes to repentance. If set in gold, it is a preservative against nocturnal terrors.
- (146) topaz; a gemstone.