Swarovski Ladies Necklaces. Gema, Collection III series. SKU: 5613735. Barcode: 191453167492. Color: Green. Swarovski Ladies Gema Necklace. This necklace showcases a an array of mixed crystals which is set in a gold-tone plated setting. Designed by Creative Director Giovanna Engelbert for Collection III. Minimum length: 14 1/8 inches, Maximum length: 15 3/4 inches. Material: Crystals, Gold-tone plated.