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Questions tagged [diamond]

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3
votes
1answer
49 views

Is it possible to form a diamond-sapphire hybrid?

I've been looking into diamonds recently and was made aware of diamond hybrids where diamond is grown on either a seed diamond or cubic zirconia. I was wondering if it would be possible to do ...
4
votes
2answers
182 views

Can I use diamonds as fossil fuel?

Aside from cultural implications (correct me if I'm wrong but artificial diamonds are not so hard to obtain, right?) diamonds are pure carbon and are more unstable than graphite. So, why not use ...
8
votes
1answer
144 views

Could diamonds be formed from coal?

Diamonds are predominately formed in cratons and brought to the surface in kimberlite pipes. However, it seems theoretically possible that diamonds could form at either subduction zones or from ...
3
votes
1answer
297 views

Why do diamond mines seem to always appear conical? Are the above-ground mines all that way? All at about the same angle?

From the BBC's Russia: Eight missing in flooded diamond mine:
2
votes
1answer
519 views

What does it take to make a diamond?

I have constantly been told through my K-12 Education that diamonds are a product of carbon, time, pressure, and temperature. If this is true, what is stopping someone from building a high-pressure, ...
3
votes
4answers
902 views

Importance of meteorite impact craters in geology?

What is the economic importance of large meteorite impact craters with a diameter over 100 m? Can they form diamonds or produce other economic deposits?
6
votes
4answers
1k views

Are all natural diamonds made of organic carbon material?

I've read that diamonds are created at a depth of about 180 km. By volcanic activity it comes above. But did plants and trees of 300 million years ago sink so deep? Or is it possible that inorganic ...
13
votes
1answer
3k views

What is it about ancient craton geology that results in associated kimberlite pipes containing economic diamond deposits?

According to the Australian Geological Survey Organisation paper Kimberlite and lamproite diamond pipes (Jaques, 1998), economic deposits of volcanically-formed diamonds are restricted to ancient ...
21
votes
2answers
13k views

Why do crystals, like quartz and diamonds, form in different colors?

Some crystals, like quartz and diamonds, form in a variety of different colors. For example, quartz can be clear, 'foggy', pink, yellow, and even blue. What happens during the crystal's formation to ...
5
votes
1answer
316 views

Why is my ♦ hammer (i.e. diamond) so durable, but it can burn? [closed]

For those confused about the title, there's a joke that every moderator has a "diamond hammer" (diamond from the little by the username). In a chat discussion, it ...