Tridaonidae beads necklace,18inch in length ,held by a white gilded clasp.the beads measure approx.14mm in diameter.（Tridaonidae beads are made from the conchs of the GIANT CLAMs, which are the biggest mussels in the world, usually found in the South Pacific and Indian oceans. Tridaonidae beads are usually used as prayer beads）