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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Quartz, other than nat. sands | $49,656 | $77,574 | $216,959 | $196,199 | $121,678 | $152,584 |
| Quartzite, cut, by sawing/othw., into blocks/slabs of a rect. (incl. square ... | $445 | $333 | $21,058 | $5,651 | $8,731 | $65,439 |
| Total | $50,101 | $77,907 | $238,017 | $201,850 | $130,409 | $218,023 |
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