Lorin: Cabochon-cut Pear shape Synthetic White Opal & IOF CZ Bezel Stud Earrings 925 Silver, 0819 Style: Sterling Silver Bezel Set Stud Earrings with a clear IOF CZ Halo. Features our fiery Synthetic White Opal Cabochon-cut gemstones and Brilliant-cut Russian IOF CZ accent stones. Made with solid 925 Sterling Silver The earrings measure approx. 10mm in diameter and weigh approx. 2.5 grams.