~34 MINERALS YEARBOOK, 1967See footnotes at end of table. 
 
Table 9.—U.S. imports for consumption of principal minerals and products—Continued

1966 
Mineral — Quantity Value 
 (thousands) 
1967 
 
Quantity Value (thousands) 
 Metals—Continued 
 Nickel: 
Pigs, ingots, shot, cathodes short tons - ' 112,886 $170,806 113,860 $193,848

                  Scrap do~... 941 709 1,104 1,240 
                  Oxide do~.. 7,711 7,967 6,208 8,130 
 Platinum group: 
 Unrefined materials: 
Grains and nuggets, including crude 
 dust and residues troy ounces  86,700 9,498 41,798 5,195 
 Scrap do~ 851 86 NA NA 
  Osmiridium do... 4,910 440 4,179 458 
 Refined metal: 
 Platinum do.._ ' 273,333 ' 31,741 322,764 38,282 
 7 Palladium do~..  902,876 28,010 737,082 27,504 
Iridium do.. 8,161 1,130 8,784 1,505 
  Osmium do.... 751 292 321 109 
Rhodium do...... 65,861 11,984 47,689 10,079 
       Ruthenium do...... 10,164 385 56,563 2,049 
 Radium: 
    Radioactive substitutes  NA 2 104 NA 3 000 
 Rare earths: Ferrocerium and other cerium alloys 
  pounds.... 13,903 65 4,293 19 
 Silver: 
    Oreand basebuflion_thousandtroyounces~ 35,992 43,601 25,642 33,437 
    Bullion do...... 27,040 32,586 29,878 43,650 
 Tantalum: Ore thousand pounds.... 2,143 4,782 1,675 5,510 
 Tin: 
    Ore(tincontent) longtons.... 4,372 12,467 3,255 7,635 
    Blocks, pigs, grains, etc do..._  41,699  152,761  50,223  166,529 
    Dross, skimmings, scrap, residues, and tin 
      alloys, n.s.p.f long tOns.  108 124 449 462 
    Tin foil, powder, flitters, etc  NA 251 NA 449 
 Titanium: 
    Ilmenite short tons.... 186,539 6,698 207,906 5,145 
    Rutile do...... 151,482 8,494 167,100 19,566 
    Metal pounds.... 11,959,375 10,854 14,950,359 14,415 
    Ferrotitanium do.._.. 60,461 21 306,317 85 
    Compounds and mixtures do...... 96,465,373 17,495 96,251,565 16,726 
 Tungsten: (tungsten content) 
    Ore and concentrate -  thousand pounds  4,298 6,859 1,699 3,784 
    Metal do~.... 385 666 129 524 
    Ferrotungsten                 do -- - 379 696                     
    Other alloys pounds.... 75,227 227 10,767 65 
Zinc: 
 Ore (zinccontent) shorttons.... 396,375 51,696 431,319 58,075 
 Blocks, pigs,andslabs do...... 280,307 75,624 222,002 57,531 
 Sheets do...... 1,708 670 648 276 
 Old, dross, and skimmings do.. - -  6,563 1,295 3,963 673 
 Dust do~.... 1,286 398 3,771 1,211 
    Manufactures NA 545 NA 318 
Zirconium: Ore, including zirconium sand 
 short tons.... 57,976 1,652 59,303 1,891 
Noninetals: 
 Abrasives: Diamonds (industrial) 
  thousand carats.... 18,569 69,110 17,102 63,559 
 Asbestos short tons... 726,459 73,100 645,112 65,743 
 Barite: 
    Crudeandground              do......  699,045 5,766 532,314 4,659 
    Witherite do........ 2,138 100 1,260 53 
    Chemicals do........ 6,552 927 5,243 682 
 Cement thousand 376 pound barrels..  7,066 17,846 5,913 14,698 
 Clays: 
    Raw short tons.... 132,336 2,644 103,404 2,039 
    Manufactured                  do......  6,359 238 5,382 252 
 Cryolite do........ 31,655 3,199 36,319 4,118 
 Feldspar: Crude long tons    280  8 
 Fluorspar short tons..  878,546 21,968 911,870 24,485 
 Gem stones: 
    Diamonds thousand carats.... 3,484 373,776 3,961 387,472 
    Emeralds do...... ' 218 ' 5,914 242 5,518 
    Other  NA 46,937 NA 46,655 
 Graphite short tons.... 56,748 2,545 56,675 2,348 
 Gypsum: 
    Crude, ground, calcined 
  thousand short tons.... 5,481 15,852 5,212 9,809 
    Manufactures  NA 1,429 NA 1,544 
 Iodine, crude thousand pounds... 7,133 5,934 3,459 3,177 
 Kyanite short tons... 3,405 141 1,821 75