Stone Type _________________ Created Black Opal Approximate Stone Size _______ 8x6mm Approximate Stone Weight _____ 1 ct Jewelry Metal _______________ Solid 925 Sterling Silver Approximate Metal Weight _____ 2.6 grams Ring Size __________________ Size selectable during checkout Our Warranty _______________ A full year on workmanship Our Guarantee _____________ Totally unconditional 30 day guarantee ____________________________________________________________________ A comfortable 8x6mm , this is a great stone. All sorts of red, blue and green flash on a black background. If this were a mined stone, it'd cost $1,000/ct, but it's not and so you and I can both afford it. This looks just like your best Lightning Ridge Opal, but it's not. Oh, and it's a LOT more durable too. Nothing gives you a bad day worse than your $1,000/ct natural black opal getting cracked up the middle just 'cause you wore it on a cold day. That won't happen with this material. Very durable, and if there's a problem, very inexpensive. Totally excellent, and fraction of what real ones would cost -- but you pretty much have to be a jeweler to tell the difference. Good strong construction, a ring that will hold up well. ____________________________________________________________________ BTW, Since we make this from scratch after you order it, we have a lot of flexibility. We can cast this in yellow, white or rose gold, and in any of 10k, 14k, or 18k. Obviously, some of these choices will affect the price, but email us and let us know what you're interested in, and we'll give you the best price we can live with. We enjoy a strong repeat business, and keep it by making good jewelry you'll want to wear at prices that we both can live with.