Our colorful necklace is a treat to behold. Vivid rectangular cushion-cut gems of sky blue topaz, amethyst, pink topaz, citrine and prasioli… Our colorful necklace is a treat to behold. Vivid rectangular cushion-cut gems of sky blue topaz, amethyst, pink topaz, citrine and prasiolite, totaling 18.10 carats, adorn a sleek 18kt yellow gold over sterling silver paper clip link chain. Includes a 2" extender. Lobster clasp, multi-gemstone paper clip link necklace.