Kimberlites are much more important in terms of their number and subsequent production of diamonds however those lamproites which have been found proved to be very productive, for example the successful Argyle mine which is a lamproite based.
Kimberlite is a potassic, ultrabasic, hybrid igneous rock containing amongst others, megacrysts of olivine, enstatite and phlogopite in a fine grained matrix of olivine, phlogopite, calcite, serpentinite, spinel and ilmenite.
Lamproite is a potassium and magnesium rich lamprophyric rock containing clinopyroxene, amphibole, phlogopite, olivine and sanidine either as megacrysts or groundmass.