Stunning Australian Semi-Black Opal Diamond Engagement Ring 18K Yellow Gold. This opal is absolutely stunning, but it does have some "directionality." This means the opal displays a beautiful play of color when viewed from one angle, but the colors may appear less vibrant from another direction.   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 18K Yellow Gold Australian Semi Black Opal, 0.55 ct Opal Boday Tone: N7 Opal Brightness: B4 Bright Opal Size: 7 x 5 mm 26 Round Diamonds: 0.084 ct Ring Size: 7 Opal Color: Reflects Bright Red, Green, Purple & Orange Colors. Occasion: Engagement/Anniversary