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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Quartz, other than nat. sands | $18,696,107 | $15,642,001 | $22,685,597 | $32,258,124 | $17,364,440 | $27,308,413 | $27,985,504 |
| Quartzite, crude/roughly trimmed | $8,175,093 | $2,397,859 | | | | | |
| Quartzite, cut, by sawing/othw., into blocks/slabs of a rect. (incl. square ... | $54,793 | $48,401 | $1,693,892 | $4,468,132 | $2,010,732 | $3,853,308 | $3,092,349 |
| Total | $26,925,993 | $18,088,261 | $24,379,489 | $36,726,256 | $19,375,172 | $31,161,721 | $31,077,853 |
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