The Lovery Elongated Onyx CZ Halo Heart Necklace is crafted in 14K Gold-Plated Sterling Silver. It features 1 Onyx Heart measuring approximately Round Cubic Zirconia. Heart Measures: 15 x 23.5 millimeters - 0.59 x 0.93 inch. Adjustable Chain Length: 16-18 inches and a lobster clasp.