Portuguese Cut Green Round Tourmaline Ring in 18k Gold. The rich green color and skillful Portuguese cut on this tourmaline combine elegantly in this simple and clean design. The term Portuguese cut refers to the extra row of facets that can be seen on the crown of the gemstone. These enhance the brilliance of the stone and have made this one of the most desirable type of cuts. Handcrafted in 18k gold, Faye Kim's design focuses on the natural beauty of the gemstone, and it is sure to be enjoyed and cherished. Tourmaline: 8.07 Carats Diameter: 13 mm Shank Width: 4 x 3 tapered Size: 6.75 Made in U.S.A.