This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Gem.pebbles.pix.label. selection of gem pebbles made by tumbling rough stones with abrasive in rotating drum The picture was made without use of camera simply by arranging the pebbles on the glass of my flat bed scanner Labels First row turquoise hematite chrysocolla tiger'seye Second row quartz tourmaline carnelian pyrite sugilite