Samuel B. Sterling Silver Men's Turquoise Biru Ring, Size 10. Our Sterling Silver pebble design ring with cushion cut turquoise, handcrafted in Bali by our skilled artisans. Each creation in the Imperial Bali™ Men’s Collections draws its power from mystic dragons, yet bows in reverence to nature and ancient Balinese patterns, weaves and textures. The December birthstone, Turquoise, is regarded as a love charm. It is also a symbol of good fortune and success, and it is believed to relax the mind and to protect its wearer from harm. Turquoise rings, in particular, are thought to keep away evil spirits.