A rock is inorganic and a solid By natural means-fashioned material with no chemical composition or atomic composition. being an impurity. Appealing samples of fluorescence will also be observed in agate and chalcedony geodes. Variations in hardness make minerals useful for different reasons. The softness of calcite causes it to https://bookmarkssocial.com/story13241008/not-known-details-about-simple-rock-cycle