The value of nonfuel mineral production in Iowa was estimated at $487 million in 2001, a decrease of about 3% from 2000. Estimated values in 2001 in specific categories included crushed stone ($204 million), construction sand and gravel ($59.4 million), and cement, crude gypsum, lime, and peat combined ($223 million). Combined values of crushed stone, portland cement, and construction sand and gravel, Iowa's leading nonfuel minerals, accounted for about 95% of the total mineral value produced in 2001. In 2001 Iowa ranked 2nd in production of crude gypsum and was a significant producer of crushed stone (38 million metric tons), portland cement, and construction sand and gravel (13.3 million metric tons). That year, Iowa ranked 31st nationally in nonfuel mineral value and 10th in the production of portland cement.