I am totally sure they are not soap stones although my doctor also said that is all it was but I don't agree with him at all. Last year I did 3 liver/gall bladder cleanses in about a 2 month period. The first time I did it I saw thousands of green and brown stones (and no I did not fish them out of the bowl) which I flushed down the toilet. Then 2 weeks later I did another cleanse. Did everything exactly the same and didn't get quite as many stones. Then about a month later I did the 3rd cleanse and I had no stones at all. Last week I did another cleanse and again got hundreds of stones out. So, if my body is simply making soap each time then why wasn't there hardly any soap stones the 2 time and none the 3rd time? Simple answer, because they are stones coming out of my liver and gall bladder and they are not soap stones. Also, my digestion system is 1000% better. I'm definitely going to continue to do this treatment at least once a year after I do a parasite cleanse. I highly recommend the colon cleanse from http://www.drnatura.com. I've recommended it to a few friends who also think it's a fabulous product.