There should probably be a more professional name for this but I think they look scallopy to me.
This is really just done using a dotting tool with larger head. Start diagonally from the middle, overlap with a second, followed by 3rd tier. Paint the remaining tip of your nails.
The hard part is choosing colours that match. Was going for rainbow but the shades don't work out.. So just make do with some colours that I enjoy looking at :)
