macro focused tumbled dark brown and shiny bronze bronzite stone

almandine background black bronze bronze shine bronzite brown cabochon closeup collection crop crystal crystalline enstatite gem gemmology gemology gemstone geological geology gold hypersthene isolated jewelry macro metallic mineral natural nature nutrition ore pebble piece polished pyroxene rock sample semi precious stone semi-precious semigem semiprecious shiny specimen stones structure texture tumble variscite white