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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Quartz, other than nat. sands | $3,124,086 | $3,194,767 | $3,354,446 | $2,549,132 | $1,943,058 | $1,848,122 |
| Quartzite, crude/roughly trimmed | $1,634,769 | $2,518,878 | | | | |
| Quartzite, cut, by sawing/othw., into blocks/slabs of a rect. (incl. square ... | $1,603,689 | $1,556,554 | $4,145,019 | $3,344,815 | $2,145,315 | $2,163,655 |
| Total | $6,362,544 | $7,270,199 | $7,499,465 | $5,893,947 | $4,088,373 | $4,011,777 |
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