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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Quartz, other than nat. sands | $846,807 | $1,306,792 | $3,322,589 | $5,796,052 | $3,698,915 | $6,271,355 | $9,732,072 |
| Quartzite, crude/roughly trimmed | $40,526 | $129,722 | | | | | |
| Quartzite, cut, by sawing/othw., into blocks/slabs of a rect. (incl. square ... | $686,386 | $789,835 | $754,853 | $598,090 | $332,774 | $213,139 | $274,768 |
| Total | $1,573,719 | $2,226,349 | $4,077,442 | $6,394,142 | $4,031,689 | $6,484,494 | $10,006,840 |
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