Opals are a unique stone that isn't quite a mineral. Opal stones contain unique patterns and colors in every piece, so there's no two stones that are alike. These 14 K. Solid Gold Leverback Earring with Natural Opals are the perfect pair of earrings to showcase your love for the gorgeous stone. These earrings are available in white, rose or yellow gold to meet your needs. Each opal is round cut and 5.0 mm in size. The earrings are a total of 0.70 carats in weight. Lucky October birthday ladies have the opal as their birthstone, which makes these earrings the perfect gift for her.