Geologists use the following tests to distinguish minerals and the rocks they make: hardness, color, streak, luster, cleavage and chemical reaction. A scratch test developed by a German mineralogist Friedrich Mohs in 1822 is used to determine mineral hardness.
Now to get that answer you need two hands make sure they both have five fingers now put your hands toughter now then count the fingers and if you count them there should be 10 unless you ate one yesterday like I did.
