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Diamond known as the "diamond." That is, we often say that the diamond's original body, which is a mineral composed of carbon, is an allotrope of carbon element. Diamond is one of many naturally occurring currently found on Earth in the hardest substance, while the 'diamond' is not only the earth only output, it is now found in meteorites fall of celestial bodies also have 'diamond' generation state phase. Diamond very versatile, such as: crafts, industry, cutting tools. Synthetic diamond graphite can be formed at high temperatures, high pressure, [1] also precious stones. It should be noted, the physical properties of graphite and diamond are completely different.
Primary diamond deep in the ground outside the office (130--180Km) high temperature (900--1300 ℃) high pressure (45--60) & 215; crystallization under 108Pa made, they main store inkimberlite or lamproite, which form's quite old. Kimberlite diamonds origin, such as South Africa Kimberley mine was formed about 3.3 billion years ago, the age of the Earth is almost the same age; and lamproites type of diamond fields, such as the Argyle mine in Australia, Botswana Ola primary ore, although young, has 1.58 billion years respectively and 990 million years. Hidden in the depths of such a large underground millions of years of diamond crystals to a bright future, have to contribute to the volcanic eruption, lava flows containing diamonds to the Earth's near-surface magma into the office, or long-distance migration of sand deposited on the river in. The former is a native form of tubular mine, which was formed by alluvial mine. Another diamond output in outer space, space impact 'nanodiamonds', it is also pure single 'carbon simple substance' characteristics.
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