I think it would look more like clear glass, but only hand spun so it had a crystal look about it. It would definitely be a very fancy shoe since it was creqted by a fairy godmother.It would alsobe open toe and  be either flat, or have a low heal on it. Definitely not s high/spike heal. And since it is a "slipper", it would be a slip on without a heel back enclosing the foot.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi