I fabricated this ring using metalsmithing techniques I have learned in a class I've just started last month, and then coming home and doing my own thing experimenting and watching the results in awe. This is fusing silver and copper into a brass sheet. Brass and copper have a much higher temperature than sterling silver. This is what creates this texture. You can see copper "dust" on the lower right side, and the brass sheet peeking here and there. The molten silver creates the smoother upper surface. The result is a texture which reminds me of a full moon, thus the name: Plenilunio, which means full moon. You can find this ring and other handmade jewelry at my Etsy shop.