I think the answer would be C. crystal structure and chemical composition, this is because crystal structure helps determain by the human eye what the mineral would be classisfied as. The chemical build up or composition helps indefenitly by breaking down the minerals make up. The answer is NOT D. use and chemical coposition. Use is absured, who who look at a mineral and say the use is... when they don't know what the mineral is yet. Use does not specify the mineral! (Sorry for my spelling) Hello there! If this answer was the most helpful one, brainliest it, rate, and thank! If it was somewhat good at least rate and thank me :) . Comments are always appreciated! ~Summer
