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The Mineral Industry of Maine

By National Minerals Information Center

Statistics and information on the nonfuel mineral commodities produced in Maine

Minerals Yearbook Vol. II - Domestic

Maine mineral commodity producing areas map from 2014 Minerals Yearbook

2017-2018 data for Maine are summarized in the table on this web page. The 2015 chapter data tables (XLS) and 2014 chapter containing text and data tables in PDF and XLS formats are available, with other years, through the links below. 

Sources of information

Maine is a major producer of peat. It produces construction sand & gravel, crushed & dimension stone, masonry & portland cement, & natural gemstones. Peat is a good plant growth medium because of its fibrous structure and water retention properties.

The following data table gives nonfuel mineral commodity production data for Maine extracted from Table 5 in the 2018 Minerals Yearbook Statistical Summary.

Nonfuel Mineral Commodity Production in Maine1,2,3
Mineral Commodity Units 2017 Quantity 2017 Value (thousands) 2018 Quantity 2018 Value (thousands)
Gemstones, naturale   NA 540 NA 546
Sand and gravel, construction thousand metric tons (1000 t) 8,190 63,900 8,060 61,700
Stone, crushed 1000 t 4,360r 34,500r 4,000 36,300
Combined values of cement, clay (common), dimension stone, peat   XX (7) XX (7)
Total (partial)   XX 98,900r XX 98,500

eEstimated. rRevised. NA Not available. XX Not applicable.

1Includes data from the commodity chapters published in the Minerals Yearbook as they were completed and released through June 2022.

2Production as measured by mine shipments, sales, or marketable production (including consumption by producers).  Mine output measured as sold or used by producers is primarily shown in the tables, because values can be assigned. Where sold or used data are not available, actual mine output is used as the production measurement and value is estimated average price of the mineral commodity for that year. Data are reported in gross weight unless otherwise specified.

3Data are rounded to no more than three significant digits; may not add to totals shown.

7Withheld to avoid disclosing company proprietary data; value included in "Undistributed" in the U.S. total value.

Minerals Yearbook Volume II Maine chapters:

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