For purposes of this article, "common variety minerals":

1. 1. Includes deposits of petrified wood, stone, pumice, pumicite or cinders, decomposed granite, sand, gravel, boulders, common clay, fill dirt and waste rock.
2. 2. Includes deposits that, although they may have value for use in trade, manufacturing and the construction, landscaping and decorative rock industries, do not possess a distinct, special economic value for those uses beyond the normal uses of those deposits.
3. 3. Includes material used as road base material, riprap, ballast, borrow, fill, facing stone, landscaping or ornamental uses and other similar uses.
4. 4. Does not include limestone suitable for use in producing cement, metallurgical or chemical grade limestone or gypsum.