The French heavy plating of 3 microns (Plaqué Or) over the brass body of jewelry becomes the best products to fill the gap. It looks exactly like gold 18K jewelry and the plating lasts 10 years and its color complements the silver outlook. In France it's qualified as precious metal jewelry so all pieces with hallmark to guarantee the authentic quality of 3 Microns at least, in other word it's guaranteed by the government of its quality.