Microdiamond, SEM

Microdiamond, SEM

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Credit: DENNIS KUNKEL MICROSCOPY/SCIENCE PHOTO LIBRARY

Caption: Coloured scanning electron micrograph (SEM) of Microdiamond from a mine in South Africa. Microdiamonds are diamonds (pure crystals of carbon) which measure less than 2 millimetres in any size. Microdiamonds are being used in industry as an alternatives to the more expensive larger diamonds. They can be used in abrasive products and as heat dissipators. Diamond is the second most stable form of carbon, after graphite. Most natural diamonds are formed at high-pressure and high-temperature conditions existing at depths of 140 to 190 kilometres (87 to 120 miles) in the Earth mantle. Carbon-containing minerals provide the carbon source, and the growth occurs over periods from 1 billion to 3.3 billion years. Magnification: x53 when shortest axis printed at 25 millimetres.

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Keywords: 29905b, abrasive, abrasives, carbon, carbon-containing, colored, coloured, containing, diamond, diamonds, dissipator, dissipators, electron, false-colored, false-coloured, formation, formations, geology, heat, high, industry, micro, microdiamond, microdiamonds, micrograph, mineral, mineralogy, minerals, pressure, scanning, sem, source, technology, temperature

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