[drcy]

Of side note, there is an advanced scientific test they use on ancient ceramics to test age, but they don't do it on porcelain due to its finish that shouldn't be damaged. Usually the only time it is done on porcelain is in insurance cases where the item is broken and they're authenticating it for monetary valuation.

However, for most valuable ancient ceramics, collectors and dealers have the test done and get a card giving the age. The test probably costs a few hundred dollars, but when you're talking about a thousands dollar item...

I suspect in the future, with some very valuable baseball item-- perhaps a trophy or something--, someone will have it carbon or other radiometric dated. As I said, I already know of one item that was, but that was for a court case.

Also of note, some of these tests are done by hobbyists, but they're most often done for historical reasons (academia, museums) or for court cases.