Material: Brass Stone Type: 7A Cubic Zirconia Plating: Rhodium, White Gold Plating Thickness: 5mm All stones on the Tennis Chain are hand-set. With glued stones, stone loss occurs more frequently over time. With hand-set products, this situation is very rare. G Central Store provides a warranty for these rare occurrences. You can refer to this article to understand the detailed difference between glued stones and hand-set stones.