kimberlite

A variety of peridotite forming pipes in which diamonds and garnets are often found.

In petrography, a dense porphyritic peridotite, occurring at Kimberley, South Africa, partly serpentinized with phenocrysts of olivin and with a few of biotite, bronzite, ilmenite, perovskite, and pyrope.

A variety of peridotite containing a high proportion of carbon dioxide; often contains diamonds.

a rare type of peridotite that sometimes contains diamonds; found in South Africa and Siberia