We basically already are. I'm not 100% certain on this, but all porcelain/ceramic pieces should be dateable through Potassium-Argon and Argon-Argon methods. Y

We basically already are. I'm not 100% certain on this, but all porcelain/ceramic pieces should be dateable through Potassium-Argon and Argon-Argon methods. You'll never see it used in archeology as it's only useful for fairly old (greater than a few hundred thousand years) samples, but Potassium-Argon (and the complimentary Argon-Argon) is a _very_ common dating method for geologic samples. Porcelain is mostly made from kaolinite, but usually includes quite a bit of various feldspars as well. I think (?) the process of making ceramics should get the feldspars involved up above the Curie temperature, if not entirely melting and re-crystallizing them. If so, you should be able to date porcelain/ceramics in the far, far distant future.