This necklace is 18 1/2 inches in length with a 3 3/4 inch extension. It is constructed by crocheting 26 gauge silver plated wire. The beads are so beautiful. The ivory and black beads are agate a semi-precious stone. There are black cube lava beads and ivory round lava beads. This is a one-of-a-kind piece is finished with a lobster clasp and the ear wires are sterling silver.