2 Carat Tourmaline Cocktail Ring in 14k Yellow Gold.  This gorgeous modern right hand ring holds a 2.20 carat green tourmaline in 14 karat yellow gold. The angular design and comfortable size makes this a wonderful ring for so many things. You could wear this in a stack if you wanted some fabulous green color, or as a stylish and subtle piece by itself. The warm gold with the rich green color is a classic combination that works with many outfits.