A 5.72-carat fancy intense blue diamond ... old and single-cut diamonds. It achieved more than $1.3 million, nearly 10 times its high estimate. It was the third most valuable lot overall in the ...

Algordanza's prices start at $3,000 for a 0.3 carat diamond ... similar weights and properties. "The diamonds can range from clear to very deep blue," Martoia said. "The more boron, the deeper ...

A rare 50 carat blue diamond was never recovered ... they have drawn a line under the affair Analysts say the dispute has cost billions of dollars in trade, and led to job losses for tens of ...