Yanuqa Black Opal Necklace Purchased around 2018. I loved it, but I'm selling it because I haven't worn it much lately. It's a necklace that allows you to enjoy various colors that appear when you change the angle. The box is also included. BAND/ Unlike traditional stone settings, this uses a unique stone setting that involves carving grooves into the stone and setting it with gold lines and irregularities. Because it's not hidden by prongs or the like, you can see the entire stone, and the non-decorative structure is a design feature. It utilizes the high processing techniques of a Kofu gemstone engraver and a metalworking specialist, a series created by "work that only that person can do" in units of 0.1 millimeters.