By the early 2000s, he had moved on to the finer stuff—diamonds, rubies ... This spring, the jewelry company he founded with metal artisan Patrick Dobbs and named for his daughter, Jamie ...

The showstopper in question: a Pomellato necklace featuring a 55.96 carat tanzanite stone, set in a bespoke bezel at the base of 78 gold-plated modules, each pavé-set with white ...

At debut, the collection, called appropriately, The Vault, consists of 30 one-of-a-kind pieces ranging from platinum cufflinks set with 8.48 carats of tanzanite surrounded by diamonds to a super ...

The tanzanite miners are aiming to position it as a birth stone': just as De Beers managed to convince us that we all had to have diamonds to mark our engagements, tanzanite's supporters hope to ...

a Tiffany Archives diamond and emerald bracelet, and a ring in platinum with green tourmaline. Emma Stone accented her clean Louis Vuitton look with a sleek yellow diamond necklace from the brand ...