kimberlite
noun
kim·ber·lite ˈkim-bər-ˌlīt 
: an agglomerate biotite-peridotite that occurs in pipes especially in southern Africa and that often contains diamonds
Example Sentences
Recent Examples on the Web The samples of kimberlite, an igneous rock which sometimes contains diamonds, came from deep beneath Chidliak Kimberlite Province in southern Baffin Island. 
Rory Sullivan, CNN, 22 Mar. 2020 Diamonds come from kimberlite, a volcanic rock found in deep layers under the earth. Micaela Erlanger, Harper's BAZAAR, 12 Dec. 2019 Conveniently, kimberlites record the erosion they experience, which wears them away from the top down. Quanta Magazine, 17 Jan. 2019 On most old blocks of Earth’s continental crust, erosion has accomplished only a modest scrubbing, wearing down less than a kilometer of rock from kimberlites. Quanta Magazine, 17 Jan. 2019 That accolade belongs to the kimberlites, ancient explosive volcanoes that propelled mantle material to the surface at frankly ridiculous speeds of around 110 miles an hour, carrying diamonds from the depths far closer to the surface. Robin George Andrews, National Geographic, 23 July 2019 The Nyurbinsky open pit mine spirals down for about a thousand feet, circling around a core of ore called a kimberlite pipe. Andrew E. Kramer, New York Times, 11 July 2018 The diamond-bearing kimberlite formations in the 11,000-foot high Maluti mountains had for years been largely untouched by mining companies, due to the difficulty and cost involved in extracting the stones from such heights. Alexandra Wexler, WSJ, 12 July 2017 Kimberlites are volcanic eruptions that bring material from the depths where diamonds can form. Erik Klemetti, WIRED, 5 May 2017 See More
Rory Sullivan, CNN, 22 Mar. 2020 Diamonds come from kimberlite, a volcanic rock found in deep layers under the earth. Micaela Erlanger, Harper's BAZAAR, 12 Dec. 2019 Conveniently, kimberlites record the erosion they experience, which wears them away from the top down. Quanta Magazine, 17 Jan. 2019 On most old blocks of Earth’s continental crust, erosion has accomplished only a modest scrubbing, wearing down less than a kilometer of rock from kimberlites. Quanta Magazine, 17 Jan. 2019 That accolade belongs to the kimberlites, ancient explosive volcanoes that propelled mantle material to the surface at frankly ridiculous speeds of around 110 miles an hour, carrying diamonds from the depths far closer to the surface. Robin George Andrews, National Geographic, 23 July 2019 The Nyurbinsky open pit mine spirals down for about a thousand feet, circling around a core of ore called a kimberlite pipe. Andrew E. Kramer, New York Times, 11 July 2018 The diamond-bearing kimberlite formations in the 11,000-foot high Maluti mountains had for years been largely untouched by mining companies, due to the difficulty and cost involved in extracting the stones from such heights. Alexandra Wexler, WSJ, 12 July 2017 Kimberlites are volcanic eruptions that bring material from the depths where diamonds can form. Erik Klemetti, WIRED, 5 May 2017 See More Word History
Etymology
Kimberley, South Africa + -ite entry 1
First Known Use
1887, in the meaning defined above