Ross-Simons - Opal Pendant Necklace in 14kt Yellow Gold. 18". RS Pure. Modern designs that complete your outfit and complement your personality. Create unique layers with this dainty necklace. Crafted in polished 14kt yellow gold, the 4mm opal pendant suspends from a simple rope chain. Springring clasp, opal pendant necklace. Opal birthstones are the perfect gift for October birthdays. Gold Opal Necklace, Dainty Opal Necklace, October Birthdays, Jewelry Presentation, Opal Birthstone, Necklace Opal, Opal Pendant Necklace, Yellow Gold Jewelry, Opal Color