For the holiday season in 2007, jeweler Suzanne Felsen created sea urchin cufflinks made of recycled gold for Barney's. Sales of the cufflinks, which cost $895 also benefit the World Wildlife Fund. Felsen has gotten bitten by the urchin bug creating other one-of-a-kind sea urchin pieces. The ring shown here features a faceted pink tourmaline set in an 18K gold sea urchin style setting. It costs $6,900.