This is directed to the original poster.... adding on to my other post!
The "green stones" yes, very soft waxy oily. My real stones were coming out black in color with tiny white shards in them. They felt a bit hard yet soft. Not always smooth in texture. Definitely NOT oily. They also did not melt. I did five flushes and never passed any of the black pieces, only the green stuff. The black stones are dispelling on their own with my GCG use. This was my experience with my stones. Good luck!