The latest blue diamond to hit the auction block certainly lives up to its namesake. The 10.03-carat Mediterranean Blue gem will be the crown jewel at Sotheby’s High Jewelry Auction this May, on ...

and Blue Book Collection brooch in yellow gold with pink and yellow sapphires, an emerald and diamonds BVLGARI High Jewelry necklace in platinum with one antique cushion ruby, one pear diamond ...