Hi Cathy! How are you doing these days? I was doing a mushroom with the agates you gave me. The base of the mushroom was an old plastic vase and I used thinset to put the agates on it. It sat there for a few days and yesterday when I grouted it, a lot of the stones came off as I was sponging. Can we use thinset for the stones? or maybe it was the combination of the plastic,thinset and the stones that didn't work? Let me know because I want to start again.

Thanks Cathy!