Such seemingly delicate crystals are tougher than you'd think! Of course, it isn't all that easy to break a crystal on a watch you're wearing, is it?
These are not plastic, nor are they glass - they are made out of a natural crystal and all of them are vintage. There are a few different sizes and shapes, but all of them are about the same - some are even wrapped in their original packaging!. Please see our measured close-up picture above, for an example of two.