Glass Ring Case

How to tell if my ring is fake or real? How to tell if it will rust or not? 10 points best answer, please help?
So i just bought a ring at ross and it was in one of those glass cases that you need to ask permission to see them. I was like 10 bucks so im guessing how can it be real and so cheap at the same time?Help please?
if its real, can i take showers with it and never take it off?
It’s a real ring yeah, but i doubt that the metal is either gold or silver.
eddies magic trick no 4 the magic sword/box


