Preciosa Crystal MAXIMA Stones in Silver plated Sew On Settings with holes in back. These MAXIMA stones are certified to meet EU and USA regulations including ASTM F2923-11, ASTM F963-11, CPSC 16 CFR 1303, CPSIA, Directive 2009/48/EC, OEKO-TEX Standard 100.They also comply with REACH and RoHS standards.