This mid-century medallion is fashioned from rare highly figured jasperiod and is created to be worn as a necklace centerpiece. This fine piece measures approximately 3" x 2" and weighs several ounces. The medallion features an artful wire mounting harness that features two options for affixing the medallion to a chain. The piece is stamped "Mexico", and although the wire is not marked "sterling" it is most certainly sterling or a silver alloy (I guarantee its composition and will refund all fees including shipping both ways if you are not completely delighted with your purchase!). A wonderful and spirited mid-century accessory!