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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Quartz, other than nat. sands | $2,542,437 | $4,131,494 | $6,920,936 | $8,667,711 | $10,234,115 | $16,048,907 | $22,331,830 |
| Quartzite, crude/roughly trimmed | $734,124 | $910,032 | | | | | |
| Quartzite, cut, by sawing/othw., into blocks/slabs of a rect. (incl. square ... | $1,211,779 | $2,533,395 | $7,019,304 | $8,681,232 | $5,729,799 | $6,793,917 | $10,297,846 |
| Total | $4,488,340 | $7,574,921 | $13,940,240 | $17,348,943 | $15,963,914 | $22,842,824 | $32,629,676 |
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