All pendants, earrings, brooches, bracelets etc are made from a zinc alloy base with rhodium plating. Earring hooks and 18” chains are a brass base with rhodium plating. Earring stud posts and 16”/18”/20” adjustable chains are stainless steel. All items are compliant with EU REACH regulations on nickel, cadmium and lead content. All items are therefore considered hypoallergenic.