set of various tumbled brown minerals with names

aegirine agate background bronzite brown bulls calcite chondrodite collage collection cut cutout description eye gagate gem gemstone isolated jaguar jasper jet leopard lignite marl marlstone microcline mineral name natrolite natural nepheline out oxs polished pumice pyrope quartz rock rutilated sample sanidine set shale skin spreusteine stone stromatolite tigers tinaksite tumbled tumbling turritella urtite various white