jaspillite ferruginous quartzite stones cutout

background banded collage collection cut cutout decorative ferruginous gem gemological gemology gemstone geological geology gray hematite iron isolated itabirite jasper jaspilite jaspillite macro magnetite metamorphic mineral mineralogy natural ore ornamental out piece polished purple quartzite raw red rock rough sample schist set specimen stone striped taconite tumbled tumbling various white