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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Quartz, other than nat. sands | $666,489 | $1,173,860 | $2,159,161 | $4,091,211 | $2,813,840 | $2,573,143 | $4,357,589 |
| Quartzite, crude/roughly trimmed | $488,258 | $352,845 | | | | | |
| Quartzite, cut, by sawing/othw., into blocks/slabs of a rect. (incl. square ... | $9,311,827 | $10,368,184 | $10,258,712 | $10,054,251 | $6,651,704 | $6,684,184 | $7,999,509 |
| Total | $10,466,574 | $11,894,889 | $12,417,873 | $14,145,462 | $9,465,544 | $9,257,327 | $12,357,098 |
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