The value of nonfuel mineral production in Maine in 2001 was estimated to be $91 million, representing a decrease of about 5% from 2000. The mining and production of construction materials accounted for the vast majority of the state's nonfuel mineral production. Construction sand and gravel alone accounted for more than 64% of total nonfuel mineral value. According to preliminary figures, leading mineral commodities, in terms of value, were construction sand and gravel (9.6 million metric tons, $37.9 million) and crushed stone (3.4 million metric tons, $20.2 million). The combined value of cement, peat, dimension stone, and granite was $32.5 million. Other mineral commodities produced included clay and gemstones.