I said: stones are formed from bile (cholesterol from bile is most likely a main ingredient, and possibly, what makes liquid cholesterol acids to precipitate into a solid cholesterol ... could be hydrochloric acid from stomach ... or possibly something else ... I never did any major analysis of stones).
Stones are most likely composed of cholesterol ... and bile is the only source of cholesterol during a liver flush.
But, if you have any doubts that smaller, real gallstones, real gallbladder sand, real billiary sludge may exit gallbladder during a Liver Flush ... then you should read a few messages:
Gallstones can not be expelled from gallbladder! Fact or Fiction?
Consider that some people, occasionally, do report getting calcified or some other kind of stone during a liver flush.
Consider that human body is a product of millions of years of evolution ... and it will only be extremely poor design if gallbladder would never be able to purge some stones out ... though it may be a painful sometimes ...
Going to a toilet may also be a painful experience sometimes ... if you are extremely constipated ... but most of the time ... it is a pleasure for most people ...
Apply the same logic to gallbladder and realize that getting smaller stones out would be as natural as getting compacted feces out from your rectum.