The diamond is a mineral composed of pure carbon. It is formed under immense pressure deep in the earth and is the hardest occurring substance known. Because of its extreme beauty, the diamond is the most popular gemstone and it is commonly used as the preferred stone to represent steadfast love. The main allure of the diamond is its brilliance.
Diamonds can be found in many colors from colorless to black, and they may be transparent, translucent, or opaque. Most diamonds used as gems are transparent and colorless or nearly so. Colorless stones are most valued, but these are rare; most gem diamonds are tinged with yellow. Colored diamonds may include red, blue, and green which are the rarest and orange, violet, yellow and yellowish green are more common.
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