Hi Robert! The description you gave of your stones could easily be describing mine. Also, I have read a previous message in which a theory was put forward that these soft stones were nothing more than olive oil, and that speculation was thoroughly blown out of the water in a very lengthy and convincing reply. I don't have any pictures to show you but I can say that mine are quite similar to those on this website. I suggest you spend a bit of time reading old messages, because you will find an answer to many of your questions there. I have just done my 5th flush and I am intending to carry on with as many as it takes, so good luck with yours!