Diamonds are made out of pure, crystallized carbon. Carbon molecules in diamonds are arranged to create a very hard, clear, crystalline structure with a Mohs scale rating of 10. Diamond values tend to fluctuate depending... More » Science Earth Science Geology

Diamonds are made of carbon atoms that formed a bond due to the heat and pressure beneath the Earth's crust. The diamonds were then ejected from the Earth's mantle in a very fast deep-source eruption. They were locked in... More » Beauty & Fashion Jewelry & Watches Precious Metals & Gems

Diamonds are made of highly organized carbon. Scientists speculate that diamonds originated from carbon dioxide atoms 100 miles below the Earth's surface more than a billion years ago. The carbon dioxide was subject to e... More »

To turn carbon into diamonds, it takes between 237,000 times atmospheric pressure (24 gigapascals) to 1.3 million times atmospheric pressure (136 gigapascals). High pressure and high temperatures in the earth's lower man... More »

The molecular structure of a diamond makes it hard, as diamonds are comprised of carbon atoms linked closely together in a lattice structure. The atoms are linked tightly via covalent bonds wherein two atoms share an ele... More »

Mine-cut diamonds are typically square or slightly oval and have a deeper crown and pavilion, or top and bottom, than modern stones. "Mine cut" does not refer to the place the diamond was faceted, but rather to its overa... More » Science Earth Science Geology

Colored diamonds form under the same conditions as clear diamonds, but their colorations are due to chemical impurities or structural imperfections within the crystal lattice. Although all diamond color varieties are pos... More » Science Earth Science Geology