Also, there are MANY posters that do not use olive oil, but rather an oil that is virtually colorless or a different color than green...and the 'stones' don't come out colorless or the color of the oil - they still come out green (like the bile).
...just my .02 cents worth :)
Unyquity
P.S. Also, check out the pictures (link at the top of Curezone Forum pages) of the gallbladder with stones and the liver with the stones in the biliary ducts...they're green too (and they obviously weren't green due to flushing, or they wouldn't be there for the pictures)