| http://www.w3.org/ns/prov#value | - If we are saying that stone, gravel, sand or clay is not included except to the extent that stone, gravel, sand or clay is a scheduled mineral, or any part of a scheduled mineral, should we not also be saying, ???or is a mineral compound???, which means any substance formed by the chemical combination of one scheduled mineral substance with any other such mineral, and should we not also be saying
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