The Mediterranean Blue has an estimated value of $20 million, auctioneers say

The Mediterranean Blue has an estimated value of $20 million, auctioneers say

 Giuseppe CACACE

A rare blue diamond valued at $20 million went on pre-auction display on Tuesday in Abu Dhabi, capital of the oil-rich United Arab Emirates.

The 10-carat Mediterranean Blue, which will go on sale in Geneva next month, is the showpiece of a collection estimated at $100 million, organisers said.

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