Diamonds, among the hardest materials in the world, are formed from millions of years of geological pressure and must be extracted from mines deep in the earth. But stones with the same chemical ...

These diamond makers create one of the most amazing materials on Earth — from dead people. For centuries, diamonds were one of the most mysterious materials on Earth. They were beautiful, ...

If you’ve inherited diamond jewelry or are looking to sell older pieces, it’s important to manage expectations, according to ...