Another type of deep volcanic rock, that just as kimberlites, may bring diamonds from great depths to the surface.

A group name for dark-coloured hypabyssal or extrusive rocks rich in potassium and magnesium.

Lamproite are ultrapotassic mantle-derived volcanic rocks. They have low CaO, Al2O3, Na2O, high K2O/Al2O3, a relatively high MgO content and extreme enrichment in incompatible elements.