The definition of “Mineral” set forth in Article III, Section 5.2 of the. Code, is hereby amended as follows[:]

“Mineral - means an inanimate constituent of the earth in solid state which when extracted from the earth, is usable in its natural form or is capable of conversion into a usable form of metal or metallic compound, a non-metal, a non-metallic compound, a raw material for manufacturing, but shall not include surface water, or subsurface water, sand or gravel regulated by Article XI of this Code, or oil and gas. Mineral shall include oil shale or tar sands.”