373. Ownership of minerals improperly worked.

If minerals1 are improperly worked by a limited owner, the minerals so severed, or their value, belong to the first person beneficially entitled in fee simple in possession. If at the time of working there is a person in existence beneficially entitled in fee simple, the severed minerals immediately become his property2, even if his equitable interest is defeasible3, and even if, between his interest and that of the person in possession, a life interest without impeachment of waste is interposed