No please don't get down about this. It is important that in this forum we encourage and support flushing for the health improvements it provides.
The most common Gallstones are green and if sufficient ES is taken to purge the digestive system then they should be expelled as a green stone. If they get held up in the digestive system they often obtain a yellowish crust which appears to be may from a mixture of "chaff" and digestive debris which may include some hard to digest food like seeds and vegetable skins.