Several months ago I became obsessed with the idea of DIYing iPhone cases and ordered a boat load of rhinestones from Etsy. This is the second case I've made, and I'm hooked on the idea of creating something that is completely custom and exactly what I want. In theory, cases like these are super easy to make but the main ingredient is patience. If you don't want the end result to look bootleg you have to take it slow and you'll end up with something fantastic.
I used E6000 glue, available at any craft store, a cheap iPhone case ordered from Amazon and AB rhinestones from Etsy, which can be ordered anywhere online or found in craft stores. The supplies probably cost me about $8 in total.
I added the glue onto small sections, then covered the section in rhinestones, then glue onto the next section and so on. For the rhinestone placement, I wrapped a piece of tape, sticky side out, to the end of a pen to pick up each one and a toothpick to help the rhinestone off of the end of the pen and onto the case.
The entire case took me a little less than two hours to complete and I let it dry overnight. I didn't worry too much about it coming out absolutely perfect or trying to pre-plan the rhinestone layout too much --- I had an idea of what I wanted to do and just let it flow.