Science Fair Project Encyclopedia
Kimberlite is a mica peridotite and a source of rich deposits of diamonds, occurring at Kimberley, South Africa. These diamonds were originally found in decomposed kimberlite which was colored yellow by limonite, and so was called "yellow ground." Deeper workings encountered less altered rock, undecomposed kimberlite, which miners call "blue ground."
Kimberlite occurs in "kimberlite pipes," vertical columns of rock that rise from deep magma reservoirs.
See also: List of minerals
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