How is radiometric able to distinguish artifact age from the geological age?

: How is radiometric dating able to distinguish artifact age from the geological age of a sample?
Say a clay pot is dated. Since radiometric dating involves seeing how much the isotopes have decayed in a sample, wouldn’t that only get the age the clay minerals were on earth as minerals rather then how long it’s been shaped into a pot? How are scientists able to distinguish that?

Answers and Views:

Answer by Soc the Poetic Chemist
if it was fired with wood heat it incorpated C

the ration of Cs indicate age

Answer by liltjwboy10
very carefully