I did these when I was on a roll of making things a week or so ago. They're just plain round black plastic sunglasses from Aldo which I hot-glued medium sized plastic gems to.
A tip if you're thinking you might make a pair, use some sort of extra strong glue, rather than hot glue. Plastic on plastic doesn't hold as good together when you use hot glue instead of some sort of extra strong. I've had a couple of the gems fall off and had to re-glue them, but other than that, they're golden!