polished hydrogoethite gemstone on white

background brown close collection dark decorative esmeraldite gem gemmological gemmology gemological gemology gemstone geological geology gray hydrogoethit hydrogoethite hydrohematite lepidocrocite lepidokrokit limonite little macro material mineral natural nature object ornamental pebble piece polished red rock rubinglimmer sample shooting small specimen stone structure surface texture textured tumbled up white