Ross-Simons - Opal Ring in 14kt Yellow Gold. Size 7. RS Pure. Modern designs that complete your outfit and complement your personality. There's always room for more dainty gemstone rings. Stationed on a small 14kt yellow gold band, a 4mm opal adds a subtle touch of iridescence to your favorite stacks. 1/8" wide. Opal ring. Opal birthstones are the perfect gift for October birthdays. Classic Gold Opal Gemstone Ring, Spiritual Gold Opal Birthstone Ring, Classic 14k Yellow Gold Opal Ring, Formal 14k Gold Multi-stone Opal Ring, Yellow Gold Opal Birthstone Ring, Oval Shape, Opal Birthstone, Opal Color, Wedding Rings Solitaire, Opal Rings