In a lot of the extra politically unstable central African and west African international locations, groundbreaking groups have taken Charge of diamond mines, employing proceeds from diamond sales to finance their operations. Diamonds bought by this process are referred to as conflict diamonds or blood diamonds.[ninety seven]
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These illustration sentences are selected mechanically from various online information sources to mirror present-day use of the word 'diamond.' Views expressed inside the examples will not characterize the belief of Merriam-Webster or its editors. Deliver us responses.
1 a : indigenous crystalline carbon that's the hardest acknowledged mineral, that is usually nearly colorless, that when transparent and absolutely free from flaws is highly valued like a treasured stone, and that is used industrially Specially being an abrasive; also : a piece of this substance
Australia offers the richest diamantiferous pipe, with production with the Argyle diamond mine reaching peak amounts of 42 metric tons a year during the nineteen nineties. Additionally, there are commercial deposits remaining actively mined inside the Northwest Territories of Canada and Brazil. Diamond prospectors proceed to go looking the world for diamond-bearing kimberlite and lamproite pipes.
Instead of kimberlite, the host rock is lamproite. Lamproites with diamonds that are not economically feasible are found in The us, India and Australia.[fourteen] Also, diamonds in the Wawa belt in the Excellent province in Canada and microdiamonds during the island arc of Japan are found in a kind of rock named lamprophyre.[fourteen]
S. led to the January 2008 bulk-sampling of kimberlite pipes in a distant Element of Montana. The Crater of Diamonds Point out Park in Arkansas is open up to the public, and is also the sole mine on earth where members of the public can dig for diamonds.
The acute hardness of diamond in particular orientations makes it handy in elements science, as in this pyramidal diamond embedded inside the Operating area of a Vickers hardness tester.
Diamonds inside the mantle type via a metasomatic method where a C-O-H-N-S fluid or melt dissolves minerals within a rock and replaces them with new minerals.
Diamonds usually are not very reactive. Under room temperature diamonds never respond with any chemical reagents together with solid acids and bases.
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Most diamonds come from the Earth's mantle, and many of the area discusses All those diamonds. However, you'll find other resources. Some blocks of your crust, or terranes, have been buried deep adequate since the crust thickened in order that they skilled ultra-high-force metamorphism. These have evenly dispersed microdiamonds that show no sign of transport by magma.
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