Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A variety of peridotite forming pipes in which diamonds and garnets are often found.
from The Century Dictionary.
- noun 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.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun geology A variety of
peridotite containing a high proportion ofcarbon dioxide ; often containsdiamonds .
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun a rare type of peridotite that sometimes contains diamonds; found in South Africa and Siberia
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
from Wiktionary, Creative Commons Attribution/Share-Alike License
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Examples
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He used an electron microprobe to analyze geological structures called kimberlite pipes — the places you occasionally (but not often) find diamonds — and discovered that the presence of chromite, ilmenite, and high-chrome, low-calcium garnet did indeed predict a rich strike.
How a Rogue Geologist Discovered a Diamond Trove in the Canadian Arctic By Carl Hoffman 2008
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The diamonds at Kimberley are found in a blue earth, technically known as kimberlite and commonly called "blue ground."
An African Adventure Isaac Frederick Marcosson 1918
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Most diamonds are found near the place where deep Earth processes blasted them to the surface in special rock material called kimberlite (named for Kimberley, South Africa).
Queens Gazette 2010
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A combination of UG bulk sampling and LDD mini-bulk sampling is required to rigorously evaluate such a large kimberlite, which is buried under some 100 metres of glacial overburden.
unknown title 2009
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These are deep, vertical shafts, usually filled with a mixture of rock types, including the diamond-bearing rock called kimberlite (Figure 1).
Signs of the Times 2009
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Meanwhile, the machines used to dig diamonds out of kimberlite ore can have hefty carbon footprints.
Green Lantern: Environmentally friendly jewelry includes synthetic gemstones 2010
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It was 1991, and he had found a kimberlite pipe (buried under 30 feet of glaciated sediment) with a concentration of 68 carats per 100 tons — the first Canadian diamonds ever found.
How a Rogue Geologist Discovered a Diamond Trove in the Canadian Arctic By Carl Hoffman 2008
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He found half a dozen, but like 98 percent of the kimberlite formations in the world, they didn't contain diamonds in commercially viable quantities.
How a Rogue Geologist Discovered a Diamond Trove in the Canadian Arctic By Carl Hoffman 2008
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(In kimberlite pipes that have gem-quality stones in commercial quantities, a concentration of 1 carat — 0.2 grams — per 100 tons can be profitable.)
How a Rogue Geologist Discovered a Diamond Trove in the Canadian Arctic By Carl Hoffman 2008
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But Fipke and Blusson surmised that the indicators De Beers found had in fact been dragged far from the kimberlite pipe eons ago by a passing glacier.
How a Rogue Geologist Discovered a Diamond Trove in the Canadian Arctic By Carl Hoffman 2008
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