The product is delivered in an envelope/bag, accompanied by a certificate and invoice. Normally, the jewelry is made of genuine silver (sterling silver), an alloy consisting of 925 (i.e., 925 parts of pure silver out of 1000 parts of the alloy) and 75 copper (i.e., 75 parts of copper out of 1000 parts of the alloy). Genuine silver is harder than pure silver...