Minerals are grouped into mineral classes primarily on a basis of _____. the number of cleavage directions present chemistry, sp
ecifically the cations within the chemical formula chemistry, specifically the anions within the chemical formula hardness; hard, soft, and medium are the three primary classes
I think minerals are grouped into mineral classes primarily on a basis of specifically the anions within the chemical formula. Anions are the negatively charged ions in a mineral. These anions are larger than cations and are mostly attracted to positive ions.
