JT6008-8ME 18'' Sterling Silver Chain with a Swarovski Crystal Drop Pendant In Gift Box Size = chain approximately 18�� Medium Emerald Swarovski crystal drop 8mm. Swarovski Crystal considered to be the best quality crystal and noted for razor-sharp cutting of its facets, creating prismatic brilliance This Swarovski Crystal pendant has a lead content in excess of 30 % . A special coating on the surface of the crystal makes it easier to clean and maintain its sparkle and lustre. Skilled technicians do the Cutting and polishing using state of the art machines to accomplish the perfect optical clarity Swarovski crystal is known for.optical clarity.