STRENGTH: 7 out of 10 POLISH: Semi (otherwise known popularly as 'Raw' amber) CONSTRUCTION: Bracelets on elastic (no clasp). Necklaces & anklets on cotton string, knotted between each bead, with a plastic twist clasp. Earrings have silver-plated nickel clasps. Typical bead size 4-5mm, but can range from 3 to 7mm, most necklaces tape