Ceramic 3d printing exists. Every so often I’m reminded that I live in the future and that it is AWESOME. It needs some work, but egads is it great. As an experiment I printed a recent design, the foundation for some organ themed knuckle dusters, in Shapeways’ ceramic. It was remarkably light and very pretty but a bit on the flimsy side. My dad took a shine to them when I was showing them off around the workshop and he, meaning to look like a fifties gangser, donned them and then brought his knuckles into his palm. Cue crunchy noises and falling bits. Alas.