Made by Preciosa Crystal, using unfoiled brilliant MAXIMA chatons. Each stone is set in a metal setting with two symmetric loops. These MAXIMA pure crystal chatons 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.