Swarovski Ladies Necklaces. Collection I, Chroma series. SKU: 5608647. Color: Pink. Swarovski Ladies Octagon Cut Chroma Necklace. This pendant necklace features two layered octagon cut crystals suspended from a fine rhodium plated chain. Designed by Creative Director Giovanna Engelbert for Collection I. Material: Crystals, Rhodium plated. Clasp type: Sliding ball. Length: 16 1/2 inch.