Finding the right glue for the job isn't always an easy task and if you get it wrong, your DIY project will fall apart before you even get started. Thankfully, DIY blog Design*Sponge has put together a chart describing which glue is best to use and when.
I love this SUPER simple tutorial for Borax crystal icicle ornaments! It uses just 2 ingredients, has few steps, and they aren't fragile at all. The best part - it's WAY cheaper than store-bought and they're a fun experiment to try with the kids! http://www.amandakatherine.com/diy-icicle-ornaments/
This is the best, the BEST epoxy glue I have personally ever used. It drys completely clear and you can use it to glue anything. You can glue metal to stone, metal to wood, glass to wood, etc. It really does set up and dry within 5-10 minutes and cures in 24 hours. I use it for birdhouses and yard art stuff!