I have two marbles, 1/2" they look black from a foot or so away. When I hold a light behind them and shine it towards myself there dark red and clear as can be, absolutely nothing in them. But when I shine the light from the front and about three inches away there is the most beautiful pattern inside. Like there is another marble inside, it looks like a onionskin tapering to both poles. But hold it up to a light and it's nothing more then a red clearie. Can't seem to get a picture of the pattern.
Hope your all not laughing at this point.