Sterling Silver Pebble Bead 55. A large hollow bead made by electroforming on moulds made from pebbles. The beads are various irregular shapes with differing textures on some faces. They have through holes which are approx 1.0mm in diameter ( some of the holes may be irregular in shape due to production methods). The beads are typically 15mm long, 10mm high and 10mm thick. The beads weigh approx 1.4gm. Please note that each bead may be different.