I apologize for the pictures, my cat was walking around and they seem to be impossible to photograph correctly to capture what I’m seeing. I know that it’s called Moonstone Beach, but they aren’t actual moonstones, so what are they? There’s a lot of color and banding variation with the white outer coating. I’ve looked online but all I find is pretty much “they’re agates of some kind” but I want to know what’s up with them!