Tourmaline Ring in Gold and Silver. I cut this high quality Afghan tourmaline in a design called ‘Turtle Checker’ with over 70 facet cuts. It’s a unique design with a diamond checkerboard design cut on the table. Beautiful Indicolite tourmaline crystal at 0.8 ct in set in an 18K gold bezel. Ring shank is textured sterling silver in a size 6 ¾  ring.