© Diamondhistorygirl [CC BY-SA 4.0]
Blue diamonds are very rare - they make about 0.1 percent of all diamonds found. Now it has been found out that they were formed in great depth - more than 660 kilometres below the surface of the Earth.
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© Diamondhistorygirl [CC BY-SA 4.0]
| Blue diamonds are very rare - they make about 0.1 percent of all diamonds found. Now it has been found out that they were formed in great depth - more than 660 kilometres below the surface of the Earth. |