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 mantle crust are pertinent for the creation of diamonds. However, diamonds are made from carbon; not coal.Continue Reading
Diamonds are formed when carbon is under an immense amount of pressure and heat. The carbon atoms found in coal are squeezed and heated, and then pushed toward the earth's surface, where they cool and become diamonds.
Plants are the source material for coal, and most diamonds are much older than the earth's first land plants. This means the earth's diamond deposits were created long before the existence of coal.Learn more about Geology
Graphite is composed of carbon and has the same chemical composition as diamond. Graphite is used to produce steel and to manufacture batteries and industrial lubricants. Graphite also contains graphene, one of the strongest known substances.Full Answer >
According to The Mineral and Gemstone Kingdom, cut diamonds have an adamantine luster, a rare and prized luster which is marked by exceptional shininess and brilliance. Raw, uncut diamonds have a more greasy luster.Full Answer >
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 possible in nature, some are easier to replicate within a laboratory setting than others.Full Answer >
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 overall shape and brilliance.Full Answer >