I want to make a rock structure of some sort, what do I use to attach the rocks.... I saw somewhere that a quick dry cement would work but I wanted to make sure it was safe for the beardie first, thanks
I don't think cement would be harmful but if you use large flat rocks you may be able to just stack them a bit and make them quite stable on their own.
I wouldn't use quikrete. It tends to be brittle and crumbly and would really only work if you are using it on a very large surface area. Grout like for bricks could work, depending on exactly what you are doing, but also just silicon or hot glue can work as well, again depending on the exact application. E6000 is also a solid bet and pretty durable. Of course the surest thing is 2 part epoxy.