No they can not.

http://curezone.com/cleanse/liver/gallstones_and_liver_flush.asp

Thanks Hanna,

This is what I have been trying to get across.  If those big "rubbery balls" were real gallstones they would never ben able to get through the ducts.  Luckily they are only saponified oil formed in the intestines and sterol-cholesterol complexes, both well known to science.

By the same token any real gallstones present of any significant size would be calcified and poses a risk of lodging in the ducts.  This requires emergency surgery.

If people want to help keep their bile level up and moving to help dissolve or prevent real gallstones there are some simple and safe things they can do such as more fiber in the diet, which helps increase bile formation.  Lecithin granules to help increase bile formation.  A little oil with each diet to stimulate bile flow.  Avoiding progesterone supplements since they inhibit bile flow.  Bitters or bitter foods to help increase bile flow and to help control excess hormones that contribute to stone formation.  B vitamin sources or TMG to help with breaking down excess hormones.  Or sterol sources to help bind bile cholesterol in the intestines to prevent reabsorption.  Any one of these can help without the risk of ending up in the emergency room with pancreatitis.