what kind of glue to use on plastic and rocks
GE Silicone II - the sealant for indoor/outdoor use. I've used it to adhere glass to plastic, rocks to wood and plastic and glass, glass to glass, ceramic and porcelain to wood and plastic and metal, etc. You name it, I've used it! I used it on a piece which I mosaiced and placed outside and forgot to bring in for the winter.