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The Mineral Industry of Connecticut

By National Minerals Information Center

Statistics and information on the nonfuel mineral commodities produced in Connecticut

Minerals Yearbook Vol. II - Domestic

Connecticut mineral commodity producing areas map from 2014 Minerals Yearbook

2018-2019 data for Connecticut 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

Connecticut produces crushed stone (mainly traprock and limestone), and construction sand and gravel. Clay is mined for brickmaking. Intermittently small dimension stone (granite and sandstone)  quarries are active.

The following data table gives nonfuel mineral commodity production data for Connecticut extracted from Table 5 in the 2019 Minerals Yearbook Statistical Summary.

Nonfuel Mineral Commodity Production in Connecticut1,2,3
Mineral Commodity Units 2018 Qty 2018 Value

(1000 $)		 2019 Qty

2019 Value

(1000 $)
Clay, common   (6) (7) (6) (7)
Gemstones, naturale   NA 8 NA 8
Sand and gravel,

construction		 1000

metric tons

(1000 t)		 4,610 45,200r 4,710 50,000
Stone, crushed 1000 t 9,270 143,000 10,000 132,000
Stone, dimension 1000 t 17 3,880r 16 5,630
Total   XX 192,000 XX 188,000

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 January 2023.

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.

6Withheld to avoid disclosing company proprietary data.

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

Minerals Yearbook Volume II Connecticut chapters:

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