TIONEER 18K Yellow Gold Plated Sterling Silver Cubic Zirconia Heart Charm Necklace, 16 Inches (+2") This sparkling heart looks like it is aflame with passion and romance. .925 Sterling Silver, with 18K Yellow Gold plating. Has approx. 100 CZ gemstones. Comes with 16" yellow gold plated silver chain, with 2" extension option. Heart is approx. 12.5mm tall and 12.5mm wide.