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If diamonds lasted forever, we wouldn't be able to shape them into faceted stones in jewelry, or pound them into dust for use by industry. Though they are the hardest natural substance known to man, they can be heated to melting and fractured by force.

Diamonds are also unstable over a very long period of time. They are a specific crystal structure of carbon that can form in high heat and pressure conditions. All diamonds on the surface of the Earth will gradually revert to the more stable structure known as graphite (used for pencils, etc). However this process will take millions of years and should not concern diamond owners.

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8y ago
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12y ago

Diamonds might last forever, but they can be destroyed by fire, like in a lava flow. They can be broken, too, or crushed. Try crushing a stainless steel ball bearing or a titanium bolt. They last a long time, too. The new ceramic ball bearings can last even longer, but are less resistant to damage from the shock of crushing, being hammered or being flexed - just like a diamond.

Probably the thing that makes a diamond unique in the world of physics is its hardness. It is harder than any other naturally occurring material. But it isn't tough like some other things. Tough things last where hard things fail. Note that the diamond is the best conductor of heat of any material we know of, but that doesn't speak to how long it lasts.

When diamond-containing rock is mined and broken up to get the diamonds, a limit is placed on how small the ore is crushed to so that diamonds in it won't be broken up and devalued. The gems that are recovered get all the press, but the little bits of diamond that get sifted out are of extraordinary value to industry as an abrasive. These are industrial diamonds. And nothing grinds like diamond. In fact, diamond dust is used to polish gem quality diamonds because nothing else will work. Is a diamond forever? Maybe. It's sold as a jewel set in a ring that is given at marriage (or engagement). Given the state society is in, it's difficult to imagine a diamond that will not outlast the marriage it celebrates and symbolizes. But forever?

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15y ago

Renewable in to what? Diamonds are carbon that has been heated many thousands of degrees, and compressed under many thousands of tons of pressure for millions of years before they pop out of the ground. Your question makes no sense.

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6y ago

Diamonds are made of carbon arranged in a crystalline structure.

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Q: Are diamonds forever If not what is diamonds made of?
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