Swarovski Ladies Necklaces. Gema series. SKU: 5639327. Barcode: 9009656393277. Swarovski Rhodium Plated Mixed Cut Gema Necklace. The Gema collection presents an irresistible necklace, featuring a stunning blend of clear crystals in classic cuts, all elegantly set in refined rhodium plating. Minimum length: 36 cm. Maximum length: 40 cm.