Australian Black Opal Necklace Trapezoid Shaped Pendant 18k Yellow Gold. Free Domestic USPS First Class Shipping! Free Gift Bag or Box with every order! Opal—the queen of gemstones, is one of the most beautiful gemstones in the world. Every piece of opal is unique in its own ways and patterns. We only use high-quality Natural Opals (NO synthetics or imitations) for our jewelry. ---------------------------------------------------------------------------------------------------- ABOUT THIS PRODUCT Solid 18k Yellow Gold Australian Black Opal, Oval Shaped, 0.5 ct 5 Diamonds: 0.04 ct Mother of Pearl Black Opal Body Tone: N2 Black Opal Brightness: B3-B2 Metal Color: Golden Opal Color: Blue, Green Pendant Size: 20 x 12 mm (include hook/bail) Blue Black Opal Size: 6 x 5 mm Occasion: Birthday/Anniversary Chain: Free 18 inches Silver Chain or 18K Solid Yellow Gold Chain for extra.