Category:Peridotite

Per"i*do*tite, n. Etym: [cf. F. péridotite.] (min.)

Defn: an eruptive rock characterized by the presence of chrysolite (peridot). It also usually contains pyroxene, enstatite, chromite, Etc. It is often altered to serpentine.

Note: the chief diamond deposits in south africa occur in a more or Less altered peridotite.