The diamonds that we see at the surface are ones then that are brought to the surface by a very deep-seated volcanic eruption. It's a very special kind of eruption, thought to be quite violent ...

Audrey Hepburn takes a break from filming Breakfast at Tiffany's — still wearing a multi-string pearl and diamond necklace.

This collision of extreme forces makes for the most exceptional gems on the planet, with unsurpassed strength and entrancing ...

Natural diamonds are formed deep underground — typically 100 miles or so below the Earth's surface in a layer called the ...

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 ...