|
| TABLE 3 | ||||||||||||||||
| EXPANDED PERLITE SOLD OR USED BY PRODUCERS IN THE UNITED STATES, BY USE1 | ||||||||||||||||
| 2005 | 2006 | |||||||||||||||
| Average | Average | |||||||||||||||
| value2 | value2 | |||||||||||||||
| Quantity | Value | (dollars per | Quantity | Value | (dollars per | |||||||||||
| Use | (metric tons) | (thousands) | �metric ton) | (metric tons) | (thousands) | �metric ton) | ||||||||||
| Concrete aggregate | 2,140 | $715 | 334 | � | 2,560 | $898 | 350 | |||||||||
| Fillers | 77,400 | 32,900 | 426 | � | 73,600 | 33,000 | 449 | |||||||||
| Filter aid | 50,600 | 17,300 | 342 | � | 48,200 | 17,000 | 352 | |||||||||
| Formed products3 | 399,000 | 64,100 | 161 | 371,000 | 60,900 | 156 | ||||||||||
| Horticultural aggregate | 95,300 | 30,900 | 324 | � | 90,400 | 32,300 | 358 | |||||||||
| Laundries | 1,060 | 284 | 269 | 1,100 | 299 | 272 | ||||||||||
| Low-temperature insulation | 1,810 | 838 | 464 | � | 3,350 | 1,370 | 408 | |||||||||
| Masonry- and cavity-fill insulation | 4,060 | 1,410 | 347 | � | 4,160 | 1,820 | 437 | |||||||||
| Plaster aggregate | 11,600 | 5,360 | r | 461 | 10,700 | 5,330 | 497 | |||||||||
| Other4 | 34,700 | 10,700 | 308 | 38,900 | 11,800 | 302 | ||||||||||
| Total or average | 677,000 | 165,000 | 243 | � | 644,000 | 165,000 | 256 | |||||||||
| rRevised. | ||||||||||||||||
| 1Data are rounded to no more than three significant digits; may not add to totals shown. | ||||||||||||||||
| 2Average value is based on unrounded data and is rounded to the nearest dollar. | ||||||||||||||||
| 3Includes acoustic ceiling panels, pipe insulation, roof insulation board, and unspecified formed products. | ||||||||||||||||
| 4Includes explosives, high-temperature insulation, paint, refractory, soap, steel, sugar manufacture, and various unspecified | ||||||||||||||||
| industrial uses. | ||||||||||||||||
Source: United States Geological Survey Mineral Resources Program