181The Mineral Industry of Colorado 
By Carl L. Bieniewski1 and William C. Henkes2 
 
 
 
 The value of mineral production in Colorado during 1967 was $346.2 million—a
decline of $16.7 million, 5 percent below that of 1966. The State led the
Nation in the production of molybdenuin, pyrites, and vanadium and was second
in the production of beryllium 
concentrate, tin, and tungsten concentrate. Mica and manganiferous ore, of
the 34 
mineral commodities produced in Colorado in 1967, had no reported production

 1 Mining engineer, Bureau of Mines, Denver, Cob. 
 2 Petroleum engineer, Bureau of Mines, Denver, Cob. 
 
Table 1.—Mineral production in Colorado 1 
 
1966 
1967 
 
Mineral 
~ 
Value 
Quantity (thousands) 
Quantity 
Value — 
(then 
sands) 
Carbon dioxide (natural) thousand cubic feet -Clays thousand short tons~Coal
(bituminous) doCopper (recoverable content or ores, etc) short tons -Feldspar
long tons.Gemstones                                         Gold (recoverable
content of ores, etc.) troy ounces -Gypsum thousandshorttons. 
Iron ore (usable) thousand long tons, gross weight - 
Lead (recoverable content of ores, etc.) short tons..Lime thousand short
tons. 
Manganese ore (5 to 35 percent Mn).~short tons, gross weight 
Molybdenum (content of concentrate) thousand pounds -Natural gas (marketed)
million cubic feet~Natural gas liquids:   LP gases thousand gallons.   Natural
gasoline and cycle products_ do.....Peat_ shorttons.... 
Petroleum (crude) thousand 42-gallon barrels -Pumice thousand short tons..Sand
and gravel do__ 
Silver (recoverable content of ores, etc.)_ - thousand troy Ounces. - 
Stone thousand short tons..Tin (content of concentrate) long tOns. - 
Tungsten concentrate (60-percent WO~ basis) short tOns. -Uranium 2 (recoverable
content U308) thousand pOunds. -Vanadium short tons...Zinc (recoverable content
of ores, etc.) do...... 
Value of items that cannot be disclosed: Beryllium concentrate, cement, fluorspar,
mica (scrap 1967), perlite, pyrites, rare-earth metal concentrate, salt,
and values indicated by symbol W - - - - 
 
Total                                          
Total 1957-59 constant dollars                       
 147,292 $25 r 599 r 1,315 5,222 26,075 4,237 3,065 891 6 NA 80 31,915 1,117
75 269 164 1,133 23,082 6,978 126 2,327 
  
 57,289 88,851 136,667 17,767 
 73,390 3,596 59,420 3,565 37,111 278 33,492 97,462 46 104 22,245 23,485
2,086 2,697 7,031 11,331 44 99 1,494. 3,626 2,651 21,205 3,697 15,888 54,822
15,898 
 XX 14,699 
182,701 
 596 
 5,439 
 3,993 
 300 
 NA 
21,181 
77 
W 
21,923 
 118 
 321 
52,040 
116,857 
 
71,544 
51,845 
21,988 
33,905 
18 
21,810 
 1,818 
 2,992 
31 
 1,276 
 2,537 
 3,317 
52,442 
 
 
 XX 
 $31 
1,274 
35,920 
3,053 
2 
 118 
 741 
 265 
 W 
6,138 
2,028 
3 
84,723 
15,542 
 
3,649 
3,215 
 204 
99,003 
 105 
22,904 
2,817 
5.485 
 59 
3,039 
20,299 
14,260 
14,519 
 
 
16,334 
 
XX ' 362,941 XX ' 342,543 
XX 
XX 
346,235 
321,175 
 Revised. NA Not available. W Withheld to avoid disclosing individual company
confidential data; included with "Value of items that cannot be disclosed."
XX Not applicable. 
 ' Production as measured by mine shipments, sales, or marketable production
(including consumption by producers). 
 2 Method of reporting changed from short tons of ore and f.o.b. mine value
(AEC Circular 5, Revised, priee schedule) to recoverable pounds of uranium
oxide and f.o.b. mill value.