Material: Brass Type: Cubic Zirconia 5A Plating: Rhodium, White Gold Plating Weight: 45cm (46gr), 50cm (51gr) Thickness: 5mm All stones on the Tennis Chain are hand-set. Stones that are glued tend to fall out more frequently over time. This rarely happens with hand-set products. G Central Store provides a warranty for these rare occurrences. You can check out this article to understand the detailed difference between glued stones and hand-set stones.