Two diamonds from South Africa’s Voorspoed mine provide a rare direct insight into the chemistry of Earth’s mantle. Although diamonds can be formed in multiple ways, the findings add to evidence ...

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A pair of diamonds that formed hundreds of kilometers deep in Earth’s malleable mantle both contain specks of materials that form in completely opposing chemical environments—a combination so unusual ...

However, to transform adamantane into diamond, scientists must precisely remove hydrogen atoms (C-H bonds) and replace them with carbon-carbon (C-C) links, arranging the atoms into a three-dimensional ...

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