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- n. Plural form of lamproite.
Sorry, no etymologies found.
Apex comments that kimberlites and to a lesser degree, lamproites, lamprophyres and alluvial deposits are the source of economic diamond deposits worldwide.
Diamonds occurs in nature in (1) primary form in igneous rocks like kimberlite, lamproites (2) secondary in conglomerates, grits and similar sedimentary rocks, (3) in Quaternary to Recent placers and (4) extra-terrestrial, as in meteorites.