..Hey im not a nonbeliever,i have done two flushes and the second one i passed,what i think for sure was colesterol floating stones,some were large around 250 plus stones came out,the first flush i passed about a dozen black or dark green balls,these i doubt was real stones,but the second flush they were more in the rock form,my daughter called them (MOON ROCKS)i thought that was cute...so i will flush again,thanks for the input..