• WordNet 3.6
    • n kimberlite a rare type of peridotite that sometimes contains diamonds; found in South Africa and Siberia
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Century Dictionary and Cyclopedia
    • n kimberlite 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. In places it has a spherulitic texture resembling chondri. It is partly brecciated and carries diamonds and fragments of carbonaceous shales. Carvill Lewis, 1887.
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In literature:

The yellow ground was already gone, and the equipment was cutting into the blue kimberlite below.
"The Flaming Mountain" by Harold Leland Goodwin

In news:

I wrote a story recently on Sonitrol Security (AKA Kimberlite) and their impressive apprehension numbers for the month of July.
Dense-media separationprocessing of 20,28 t of kimberlite, collected last year as a single surface sample from the outcropping Q1 kimberlite, had returned a total of 6,08 carats of diamonds , which indicated a diamond content of 30 ct/100 t.