Fireball - Mexican Fire Opal & Diamond Engagement Wedding Ring 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 18K Yellow Gold Mexican Fire Opal, 0.39 ct 6 Diamonds: 0.085 ct Opal Color: Red with Play of Colors. Opal Size: 5 x 5 mm Ring Size: 7 Occasion: Engagement / Wedding