Lamproite is a type of diamond-bearing volcanic rock. Previously only kimberlite was thought to bring diamonds from deep within the earth to the surface; however the 1979 discovery of the Argyle Mines in Western Australia have caused geologists world wide to re-examine known deposits of lamprolites for diamond caches. So far, the Argyle Mine is the only known source of lamproites bearing diamonds; it is also the world's largest producing mine of rare fancy pink diamonds.
See also: Kimberlite, Diamond