Science Qurstion & Diamonds!

[Fanatical Meat]

Don't get excited it’s not about making them out of charcoal in the backyard.

Diamonds come from coal that is under under tremendous pressure and heat

If we could put a camera on a diamond and it never moved or broke, could we watch the diamond become coal again over millions of years assuming the camera could be sped up to match?

Would it expand as it became coal again or would it expend from the inside and “pop” like popcorn?

Am I totally wrong?

 

[Jon-T]

Diamonds do not come from coal. The debris from the carboniferous period is buried in the ground it never reaches the necessary pressure or temperature.

 

[Fanatical Meat]

Diamonds do not come from coal. The debris from the carboniferous period is buried in the ground it never reaches the necessary pressure or temperature.

So I’m wrong?

 

[IronWing]

Have some science.

https://www.ncbi.nlm.nih.gov/pubmed/22694904

http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.536.6478&rep=rep1&type=pdf

 

[DigDog]

The lack of pressure would not change them back to coal. Brodaly speaking diamonds are not pressurized coal, they are a stable new formation that happens when coal is pressurized - but once it's done, it's done.

 

[Fanatical Meat]

The lack of pressure would not change them back to coal. Brodaly speaking diamonds are not pressurized coal, they are a stable new formation that happens when coal is pressurized - but once it's done, it's done.

Diamonds are forever is true?

 

[lxskllr]

Diamonds are forever is true?

Til the sun explodes.

 

[Jon-T]

Til the sun explodes.

After which we have the mother of all diamonds!

http://news.bbc.co.uk/2/hi/3492919.stm

 

[GagHalfrunt]

Diamonds are forever is true?

No. They won't spontaneously un-diamond themselves and revert back, but they can be destroyed. Get them hot enough and they vaporize.

 

[ctbaars]

This configuration is considered “metastable”.
Eventually, all things degrade and decay due to entropy. Diamonds are not immune to this process as they eventually degrade into graphite.
A small diamond, like the kind found in an standard size engagement ring, would take billions of years or more to totally convert itself into graphite.

From g00gle: https://zidbits.com/2015/10/does-a-diamond-really-last-forever/