Wiktionary
refinable
a. Capable of being refined
Usage examples of "refinable".
Both had achieved sapience at about the same time, but the presence of readily refinable metals on the crust of the Masters' planet had given them an impetus toward technology that the Slaves lacked.
Thus, to determine how many thousands of tons were going to be necessary to produce as much as fifty pounds of uranium, it was necessary to have refinable quantities.