Rhodium-plated Silver Hexagon Cubic Zirconia Simulated October Birthstone European Style Bead Charm Slide-on (not threaded) bead charm Rhodium Plated on 925 Solid Sterling Silver Approximately 4.6mm Hole Size Fully compatible with European-style charm bracelets such as Pandora, Troll, Biagi, Persona, Ohm, Kay's Charmed Memories and More.