| Class 811: Quarrying of ornamental and building stone, limestone, gypsum, chalk and slate |
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| This class includes:
- quarrying, rough trimming and sawing of monumental and building stone such as marble, granite, sandstone etc. - breaking and crushing of ornamental and building stone - quarrying, crushing and breaking of limestone - mining of gypsum and anhydrite - mining of chalk and uncalcined dolomite |