• Question: Have diamonds ever been found in volcanic rock

    Asked by normal to James on 20 Nov 2013.
    • Photo: James Hickey

      James Hickey answered on 20 Nov 2013:

      Hey normal,

      Diamonds are almost only found in volcanic rock. But a rare type of volcanic rock called kimberlite. These are formed very deep within the Earth’s mantle, 150 – 450 km below the surface! They are then transported up through the crust and make their way through vertical volcanic pipes to get to the surface.