18 Karat Gold Plated 18KGP Heart Shaped Amethyst & CZ Cubic Zirconia Necklace Excellent condition! Stamped 18KGP on pendant and clasp. See photos for details. measures aprox 17" with 3/4" pendant spring ring clasp This amethyst is a light bluish lavender color An 18k gold plated silver necklace with an amethyst heart pendant is a stunning piece that can add a touch of glamour to any outfit. The faceted amethyst heart pendant is adorned with shimmering cubic zirconia, creating a truly mesmerizing piece.