polished anthophyllite gem stone on white

amphibole anthophyllite antofillite asbestos azbolen background banded black close collection decorative gem gemmological gemmology gemological gemology gemstone geological geology gray hornblende hornblendeasbestos jewelry little macro material mineral mineralogy natural object ornamental pattern pebble piece polished pyroxene rock sample semiprecious small specimen stone striped structure surface texture tumbled up white