This natural Ethiopian welo opal, natural Cambodian zircon, and created blue opal along the shoulders of the ring is finished in 3 grams of platinum that is highly polished over nickel free premium sterling silver. Cambodian zircon is a natural gemstone. It comes closer to resembling a Diamond than any other natural gemstone. It is not cubic zirconia. Platinum also protects the ring from tarnishing. All Jewelry is shipped with a velvet Jewelry pouch and satin lined Jewelry box. **** If you are looking for a specific gemstone jewelry piece, please browse through my other listings or contact me. I have more exquisite pieces available for purchase in a variety of styles that have not been posted.