According to moh's hardness scale, your fingernail would be rated as 2.5. juan and carol are trying to identify an unknown mineral. carol can scratch the mineral sample with her fingernail. juan and carol know the mineral must be one of these four choices. based on the scratch test, the mineral is a) apatite. b) calcite. c) gypsum. d) pyrite. ' heres a pic if u need it mohs scale of mineral hardness hardness mineral absolute hardness 1 talc 1 2 gypsum 2 3 calcite 9 4 fluorite 21 5 apatite 48 7 quartz 100 8 topaz 200 plz! i couldnt get the table things but that was part of it though!