quartz-based stone
A stone that may be either sedimentary in formation (as in sandstone, or metamorphic, as in quartzite). Definitions of the classes of stone which form the quartz-based stone group are explained in ASTM C119.
A stone that may be either sedimentary in formation (as in sandstone, or metamorphic, as in quartzite). Definitions of the classes of stone which form the quartz-based stone group are explained in ASTM C119.
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