Series Number | Hardness | Rock |
11# | HRC0 | magnetit,metamorph schist,gneiss,granite,basalt,gabbro,rhyolite,diorite,conglomerate,taconite |
10# | HRC5 | magnetit,metamorph schist,gneiss,granite,basalt,gabbro,rhyolite,diorite,conglomerate,taconite |
9/10# | HRC8 | andesite,pegmatite,hematite,magnetit,metamorph schist,gneiss,granite,basalt,gabbro,rhyolite,diorite |
9# | HRC10 | andesite,pegmatite,hematite,magnetit,metamorph
schist,gneiss,granite,basalt,gabbro,rhyolite,diorite |
8# | HRC12 | dolomite,marble,peridotite,andesite,pegmatite,hematite,magnetit,metamorph
schist,gneiss,granite,basalt |
7/8# | HRC15 | dolomitic limestone,schist,serpentine,hard & mica schist,siliceous
limestone,dolomite,marble,peridotite,andesite,pegmatite,hematite |
7# | HRC18 | dolomitic limestone,schist,serpentine,hard & mica schist,siliceous
limestone,dolomite,marble,peridotite,andesite,pegmatite,hematite |
6/7# | HRC20 | med-hard limestone,hard limestone,hard shale,dolomitic
limestone,schist,serpentine,hard & mica schist,siliceous
limestone,dolomite,marble,peridotite |
6# | HRC25 | med-hard limestone,hard limestone,hard shale,dolomitic
limestone,schist,serpentine,hard & mica schist,siliceous
limestone,dolomite,marble,peridotite |
5# | HRC30 | claystone,sandy limestone,soft schist,med-hard
sandstone,siltstone,alluvial deposits,calcitic limestone,med-hard
limestone,hard limestone,hard shale,dolomitic limestone |
4# | HRC36 | claystone,sandy limestone,soft schist,med-hard
sandstone,siltstone,alluvial deposits,calcitic limestone,med-hard
limestone,hard limestone,hard shale,dolomitic limestone |
3# | HRC39 | soft shale,chalk,marly shale,med-hard limestone,salt,frozen
soil&ice,soft sandstone,sandy shale,claystone,sandy
limestone,soft schist,med-hard sandstone,siltstone,alluvial
deposits,calcitic limestone |
2# | HRC41 | soft shale,chalk,marly shale,med-hard limestone,salt,frozen
soil&ice,soft sandstone,sandy shale,claystone,sandy
limestone,soft schist,med-hard sandstone,siltstone,alluvial
deposits,calcitic limestone |
1# | HRC43 | sand,soft shale,chalk,marly shale,med-hard limestone,salt,frozen
soil&ice,soft sandstone,sandy shale,claystone,sandy
limestone,soft schist |
