(BBC): Scientists say they have discovered compelling evidence that diamonds exist in the icy mountains of Antarctica.

The researchers have identified a type of rock in the permanently frozen region that is known to contain the precious stones.
However recovering any Antarctic mineral resources for commercial purposes is currently forbidden.
The research is published in the journal Nature Communications.
Diamonds are formed from pure carbon under extreme heat and pressure at depths of about 150km in the Earth’s crust.
Ice under ice
Volcanic eruptions bring the valuable crystals to the surface, usually preserved in another type of bluish rock called kimberlite.
The presence of kimberlite has been a clue to significant deposits of diamonds in several parts of the world, including Africa, Siberia and Australia.
Now researchers have, for the first time, found evidence of kimberlite in Antarctica.