Volcanoes eject huge clouds of sulfur dioxide ... he said. This is where diamonds could come in handy, Vattioni said. In a modeling study published in October, he and colleagues found that ...

A diamond unearthed in a diamond mine in Botswana ... Over time it makes its way back to the surface via volcanic activity. This slurp-down, spew-out cycle is known as the deep water cycle ...

eg diamonds - this can be mined to make money Volcanic bombs and heat clouds, with temperatures up to 800°C, spread over a distance of 10 kilometres. Pyroclastic flows travelled three kilometres ...