|
| TABLE 3 | ||||||||||||||||
| EXPANDED PERLITE SOLD OR USED BY PRODUCERS IN THE UNITED STATES, BY USE1 | ||||||||||||||||
| 2006 | 2007 | |||||||||||||||
| 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 | 2,560 | $898 | 350 | � | 2,160 | $844 | 392 | |||||||||
| Fillers | 73,600 | 33,000 | 449 | � | 74,700 | 33,900 | 453 | |||||||||
| Filter aid | 48,200 | 17,000 | 352 | � | 41,000 | 14,600 | 355 | |||||||||
| Formed products3 | 371,000 | 60,900 | 164 | r | 330,000 | 59,200 | 179 | |||||||||
| Horticultural aggregate | 90,400 | 32,300 | 358 | 75,000 | 28,700 | 384 | ||||||||||
| Laundries | 1,100 | 299 | 272 | 875 | 250 | 286 | ||||||||||
| Low-temperature insulation | 3,350 | 1,370 | 408 | � | 1,660 | 846 | 510 | |||||||||
| Masonry- and cavity-fill insulation | 4,160 | 1,820 | 437 | � | 3,380 | 1,450 | 430 | |||||||||
| Plaster aggregate | 10,700 | 5,330 | 497 | 6,760 | 2,250 | 332 | ||||||||||
| Other4 | 38,900 | 11,800 | 302 | 39,100 | 12,700 | 326 | ||||||||||
| Total or average | 644,000 | 165,000 | 256 | � | 575,000 | 155,000 | 269 | |||||||||
| 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