Blue diamond ring

A two-stone ring with a rare triangular blue diamond the size of a quarter on a gold band with baguette-cut diamonds could bring at least $15 million when it is offered at auction in New York next month. Christie’s said in advance of the October 20...

A two-stone ring with a rare triangular blue diamond the size of a quarter on a gold band with baguette-cut diamonds could bring at least $15 million when it is offered at auction in New York next month.

Christie’s said in advance of the October 20 sale that at 10.95 carats, the stone is the largest triangular-shaped fancy vivid blue diamond ever to come to auction. It is paired with a 9.87-carat white diamond cut in the same shape.

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