The Agate Stone Collar Necklace has earthy charm. This design features real semi agate stone sliced into a pendant, each with unique variation. Pair it with pieces from our Blue Stone Collection and your classic favorites. Collar necklace with lobster claw clasp closure. Dimensions: 17" + 4" extender. 85% semi agate stone, 13% brass, 2% steel. Part of the Blue Stone Collection. Custom designed exclusively for Chico's. Handcrafted with nickel-free metal.