In creating this necklace and earring set I incorporated 12 mm round chrysocolla beads and sterling silver findings including Bali beads, crimp covers, chain and a lobster claw clasp. The necklace can be adjusted from 15 1/2" to 18" and the earrings are one inch plus the ear wires. The supplier said the beads were Chrysocolla but they may be dyed Jasper. Either way, they are beautiful Beads.