there was a lady/guy a while back who showed 'them' (the 'stones' she popped out) to a Doc friend of hers who is familiar with the liver/galbladder as being taught in medical school who confirmed it were indeed galstones.
guess we dont need further proof
someone also has sent these stone/bile formations to a lab and had them analyzed with the result that the contents were of the same identity as 'real' galstones as taken out of the galbladder after galbladder surgery