dodecahedral natural deep red garnet lightly tumbled polished crystal

abrasive gem almandine close crystal deep red dodecahedral dodecahedron faceted gemology gemstone geology isolated isometric isometric crystal system jewel macro mahogany mahogany garnet red mineral mineralogy natural shape shapes stones nature nesosilicate precious pyrope quartz raw rock shadow shine shiny silicate specimen stone sunlight surface tumbled tumbled facet uncut white white background