Gorgeous Necklace New With Tag. Metal14k Yellow Gold Over Brass MaterialWhite Kyocera Opal Size0.38"L x 0.63"W, 15" chain with 2" extender ClosureLobster clasp Material Highlight: Kyocera OpalOur Kyocera Opal is a lab grown, stabilized opal created to mimic the dazzling structure of natural opal. Beautifully reflective and never dyed, this stone takes 12-14 months to produce and is best loved for its striking flashes of colored light.