set of various polished stones with names

agate amethyst aventurine background calcite carnelian castorite chalcedony chrysocolla collage collection cornelian crystal cuprite cutout description gem gemstone green hematite isolated jasper kyanite labradorite lapis lazuli lazurite magnesite malachite many mineral name natural obsidian petalite polished prasiolite prehnite quartz rhodochrosite rock rockcrystal sapphirine set shattuckite sodalite stone ulexite various vermarine white