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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Bentonite | $27,601,000 | $28,179,000 | $28,357,000 | $27,194,000 | $19,869,000 | $30,063,302 | $33,646,603 |
| Decolourising earths & fuller's earth | $666,000 | $592,000 | | | | | |
| Fire-clay | $1,856,000 | $1,094,000 | $1,944,000 | $2,823,000 | $1,486,000 | $2,377,080 | $1,861,912 |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $81,637,000 | $95,551,000 | $112,150,000 | $120,103,000 | $95,909,000 | $102,429,085 | $113,968,279 |
| Andalusite, kyanite & sillimanite | $928,000 | $1,422,000 | $3,008,000 | $3,792,000 | $1,637,000 | $2,418,155 | $3,841,103 |
| Mullite | $11,821,000 | $13,393,000 | $14,763,000 | $18,957,000 | $8,917,000 | $15,172,765 | $19,913,240 |
| Chamotte/dinas earths | $17,469,000 | $19,777,000 | $21,735,000 | $19,153,000 | $17,489,000 | $16,611,733 | $20,935,063 |
| Total | $141,978,000 | $160,008,000 | $181,957,000 | $192,022,000 | $145,307,000 | $169,072,120 | $194,166,200 |
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