n. A variety of peridotite containing a high proportion of carbon dioxide; often contains diamonds.
The Century Dictionary and Cyclopedia
n. 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.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a rare type of peridotite that sometimes contains diamonds; found in South Africa and Siberia
Word Usage
"The diamonds at Kimberley are found in a blue earth, technically known as kimberlite and commonly called "blue ground.""