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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Quartz, other than nat. sands | $5,178,426 | $6,544,451 | $9,596,207 | $10,390,616 | $4,820,611 | $5,803,135 | $9,258,696 |
| Quartzite, crude/roughly trimmed | $5,602,806 | $3,661,091 | | | | | |
| Quartzite, cut, by sawing/othw., into blocks/slabs of a rect. (incl. square ... | $8,459,506 | $8,920,546 | $15,893,490 | $14,728,383 | $11,590,697 | $14,574,394 | $15,236,577 |
| Total | $19,240,738 | $19,126,088 | $25,489,697 | $25,118,999 | $16,411,308 | $20,377,529 | $24,495,273 |
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