Epoxy itself is glue that will hold to metal.
An epoxy glue would work best.
Any kind of epoxy is best for this
Most people don't like them glued together, however it could be done with epoxy or possibly super glue.
Epoxy will work for any kind of stone.
Epoxy is best for that.
It depends what librarian model & what kind of glue/epoxy your using to bond them together. In my experiences it was difficult but doable.
Epoxy will do that kind of repair.
Epoxy is good for sticking mirrors on.
Epoxy is the best type of glue to use for wood.
PVA glueANS 2 Epoxy or carpenters yellow glue may be best, depending exactly what you are gluing.
Depends entirely on what kind of glue. Simple white glue is fairly cheap- a gallon is a few dollars. There some epoxy glues that could be a couple of hundred dollars.
Epoxy will make a better bond than anything.