The Mineral Industry of Maine
Statistics and information on the nonfuel mineral commodities produced in Maine
Minerals Yearbook Vol. II - Domestic

2018-2019 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.