Click Pin it to share this product on Pinterest! A sleek, petite coffee mill in black. Crafted in Japan, Zirconia 206 is Kyocera's proprietary advanced ceramic. This one-of-a-kind advanced ceramic material has very dense particles and extremely tight molecules, which leave minimal voids. This translates into a stronger, denser blade that holds an edge longer than other ceramic knives and kitchen supplies. The thinner blade on a Kyocera Advanced Ceramic knife means minimal resistance. Clean, precise, less-intrusive cuts, using less pressure, are what make the Kyocera ceramic knife so unique.