Файл:Tumbled gemstone pebbles arp.jpg

Tumbled gemstones, scanned on an Epson flat bed scanner. This is not a photograph!

Note that four of the items in the picture are not tumbled:

• the red ruby crystal at bottom left, below the big blue pebble
  
• the pale green and red tourmaline crystal, above and to the right of the ruby
  
• the golden-coloured pyrite cube, exactly in the centre
  
• the transparent calcite rectangle at top left

Scanned by Adrian Pingstone in March 2009 and placed in the public domain.