The value of nonfuel mineral production in New Hampshire in 2001 was estimated to be about $60 million, an incease of about 5.5% over 2000. The total dollar values reported in 2001 were artificially low because information was withheld to protect company confidentiality.
Construction sand and gravel remained the state's most important nonfuel mineral in 2001, accounting for about 75% of total value. According to preliminary figures, in that year 9.5 million metric tons of construction sand and gravel were mined, worth $46.1 million. There were 3.3 million metric tons of crushed stone mined, worth $14.2 million. Dimension stone, common clay, and gem stones collected by hobbyists accounted for the remainder of the state's mineral value. Sand and gravel are mined in every county, and dimension granite is quarried in Hillsborough, Merrimack, and Coos counties. Crude gypsum, imported into the state, was calcined at two plants to manufacture wallboard.