set of various tumbled brown rocks with names

aegirine agate argillite background brown bulleye chiastolite collage collection cut cutout description falconeye gagate garnet gem gemstone hawkeye hornblende irnimite isolated jaguar jasper jet leopardskin lignite mineral mudrock mudstone name natural nepheline out oxeye pietersite polished pumice quartz rock rutilated sample sanidine set stone stromatolite stromatolith tigereye tumbled tumbling turritella urtite various white