Thank you very much for viewing this item. Stone: Natural crystal Clark carving, 1 bead, 10mm Number of stones: 19 Inner circumference: Approximately 15.5cm (stretches) String: Polyurethane rubber, quadruple knot Instant purchase is welcome. * Colors may differ from the photos due to the nature of natural stones. * Colors may appear slightly different from the actual product due to lighting conditions. * Please understand that cancellations, returns, and exchanges are not accepted after purchase.