PERIDOTITE

Per″i‐do‐tite (?), n. [[Cf. F. péridotite.]] (Min.) An eruptive rock characterized by the presence of chrysolite (peridot). It also usually contains pyroxene, enstatite, chromite, etc. It is often altered to serpentine. ☞ The chief diamond deposits in South Africa occur in a more or less altered peridotite.