Two Colors Australian Boulder Opal Trillion Diamond Engagement Wedding Ring 18K Yellow Gold. Free Domestic USPS First Class Shipping!  Free One Year Limited Warranty!  Free Gift Bag or Box with every order! Opal—the queen of gemstones, is one of the most beautiful and rarest gemstones on earth.  Every piece of opals has its colors and patterns, which is perfect for designers to create unique engagement rings for someone extra special.  We use 100% Natural & Ethically opal stones (NO synthetics or imitations) for our jewelry. --------------------------------------------------------------- ABOUT THIS PRODUCT 18K Yellow Gold, Australian Boulder Opal, 0.33 ct Trillion Shaped Diamond: 0.101 ct Opal Size: 6 x 4 mm Ring Size: 7 Opal Color: Reflects Green, Yellow, Blue, and Orange Colors. Occasion: Birthday/Anniversary ---------------------------------------------------------------------------------------------------