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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Quartz, other than nat. sands | $2,473,958 | $1,674,698 | $6,045,674 | $8,385,962 | $3,501,375 | $7,496,841 |
| Quartzite, crude/roughly trimmed | $1,363,358 | $1,979,756 | | | | |
| Quartzite, cut, by sawing/othw., into blocks/slabs of a rect. (incl. square ... | $4,005,946 | $3,925,770 | $6,127,726 | $5,538,516 | $4,468,707 | $3,164,296 |
| Total | $7,843,262 | $7,580,224 | $12,173,400 | $13,924,478 | $7,970,082 | $10,661,137 |
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