pe·ri·do·tite /pəˈrɪdəˌtaɪt/
橄欖岩
Per·i·do·tite n. 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.
Note: ☞ The chief diamond deposits in South Africa occur in a more or less altered peridotite.
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peridotite
n : a dark coarse-grained igneous rock consisting principally of
olivine