MM, this is a touchy area. I put one green one in to be analysed and was told it is not a gall stone but they didn't tell me what it was. I don't believe them. I believe the green waxy ones are biliribin (sp?) and pre-calcified. The proof that you have got something out of your body that shouldn't be there is in the changes to your health and your pain relief.
Armistead had his analysed recently and his hard ones were confirmed as gall stones. Others have also had theirs (both soft and hard) confirmed as gall stones. So, it seems to depend on the lab!
As for mercury, etc. I think the labs have their standard procedures for how they test what. I imagine you would have to have pretty good connections to have such a thorough analysis as determining mercury content etc. Let us know if you find someone!
I think mainly what is coming out is solidified toxic bile and dead parasites. I've heard of people passing small tumours and cysts too.
Anyway, it's out and that's what counts!!