I've had a pack of plain white shells for ages and never done anything with them. Until now.
I made this necklace by drilling a small hole in the top of each shell, which is not easy I can tell you.
Then I painted them with nail varnish so that they'd be shiny.
I think if I make another one I'll pick less random colours. Like all blues and purples. Or pinks. There's always a lot of pink nail varnish.