The world's second-largest gem quality diamond has been discovered in Botswana, the Lucara Diamond firm says.
The 1,111-carat stone was recovered from its Karowe mine, about 500km (300 miles) north of the capital, Gaborone.
It is the biggest diamond to be discovered in Botswana and the largest find in more than a century.
The 3,106-carat Cullinan diamond was found in South Africa in 1905 and cut into nine separate stones, many of which are in the British Crown Jewels.
http://www.bbc.co.uk/news/world-africa-34867929
WHAT IS A 'CARAT'? (24 CARAT GOLD, BUT 1111 CARAT DIAMOND? WEIRD)
Diamonds found at or near Earth's surface have formed through four different processes. The plate tectonics cartoon above presents these four methods of diamond formation.
For more information click here.
This diamond was formed in a kimberlite (number 1 on the diagram above):
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