These crystal stones are manufactured in accordance with the highest environmental and sustainable practices and meet the following world standards: ASTM F2923-11, ASTM F963-11, CPSC 16 CFR 1303, CPSIA, Directive 209/48EU, OEKO-TEX Standard 100 and more. They are produced using Hi-Pure Crystal technology, a unique process developed to produce lead-free and barium-free (less than 990ppm) crystal components with spectacular brilliance. The innovative Dura-Foiling guarantees perfect light reflection and superior resilience.