Here are simple half moons you guys can do at home.
Black: Bc&Co - Shade 11
Silver: Cate Ruby - Metal mix
I started of with a few coats of the black and then topped it with Rimmel - Matte Finish.
I then used the silver glitter polish to paint a half moon and topped it with some glitter (just to and a bit more sparkle), which I picked it up from the $2 dollar shop.