Eighteen jewelry designers create pieces featuring unusual copper-rich green tourmalines. By Amy Elliott Two years ago, the jewelry designer Vanessa Fernández found herself admiring a curious ...

“I collected a type of stone called Paraiba tourmaline years ago, and now it’s very difficult to find. Thankfully we have a big collection.” She also uses a semi-precious stone called ...

Its estimate is $115,000 - $170,000. Then there’s a 10.11-carat Paraiba tourmaline from Brazil, where the rare gemstone was first discovered. It has been heat treated but exhibits no further ...