set of various andalusite gem stones cutout

andalusite background black chiastolite close closeup collage collection cross crossshaped cut cutout epidote gem gemmological gemmology gemological gemology gemstone geological geology inclusion isolated matrix mineral mineralogical mineralogy natural nunderite nundle nundoora nundoorite nundora nundorite out pebble polished quartz rock rolled sample set specimen spot spotted stone surface tumbled tumbling various white