Adorable Heart Shaped Mexican Fire Egg Opal Engagement 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 Egg Opal, 0.66 ct Opal Size: 7 x 6.5 mm Ring Size: 7 Opal Color: Reflects Bright Red. Occasion: Engagement/Anniversary