Beautiful Opal Necklace Exquiste genuine Opal pear shape pendant necklace on a sterling silver 16" chain. Opal measures 18 x13mm is set in a beautiful filigree design cast in .925 sterling silver. Total Ctw. 5.00 cts. Bold 5.00 Cts Filigree Genuine Opal Necklace. Jewelry, Fashion