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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Quartz, other than nat. sands | $1,623,776 | $2,764,716 | $7,234,580 | $11,827,705 | $10,330,562 | $16,539,296 | $21,180,280 |
| Quartzite, crude/roughly trimmed | $1,848,990 | $2,366,708 | | | | | |
| Quartzite, cut, by sawing/othw., into blocks/slabs of a rect. (incl. square ... | $6,559,807 | $7,431,587 | $11,080,396 | $10,538,401 | $9,987,737 | $11,355,357 | $8,967,738 |
| Total | $10,032,573 | $12,563,011 | $18,314,976 | $22,366,106 | $20,318,299 | $27,894,653 | $30,148,018 |
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