What minerals will a penny not scratch.

hope this helps The Mohs Hardness Scale ranks the order of hardness of minerals and some common objects. For example, your fingernail can scratch the minerals talc and gypsum, with a hardness of 2 or lower. A copper penny can scratch calcite, gypsum, and talc.

answer; the correct answer to the above statement is (biosphere); ///

answer at the divergent plate boundary in the middle of the ocean;