The value of nonfuel mineral production in Minnesota in 2001 was estimated to be about $1.44 billion, an increase of about 3.5% from 2000. Iron ore, Minnesota's leading mineral commodity, accounted for $1.16 billion of this total mineral value. Iron ore is found along a belt that runs through Itasca and St. Louis counties. The combined value of lime, industrial sand and gravel, dimension granite, and limestone was $43.3 million in 2001. The estimated value of crushed stone was $85 million. The state ranked 8th nationally in value of nonfuel minerals produced during the year. Minnesota ranked 1st nationally in iron ore and 3rd in peat. Iron ore mined in Minnesota accounted for 70% of all domestic shipments to US steel manufacturers in 2001. Minnesota's output of construction and industrial sand and gravel and dimension stone is also significant.