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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Quartz, other than nat. sands | $1,932,867 | $1,754,464 | $2,307,346 | $1,462,273 | $1,394,456 | $2,829,168 | $4,584,637 |
| Quartzite, crude/roughly trimmed | $553,491 | $561,439 | | | | | |
| Quartzite, cut, by sawing/othw., into blocks/slabs of a rect. (incl. square ... | $259,699 | $614,645 | $867,059 | $699,528 | $671,441 | $1,383,872 | $1,323,747 |
| Total | $2,746,057 | $2,930,548 | $3,174,405 | $2,161,801 | $2,065,897 | $4,213,040 | $5,908,384 |
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