The ocean only seems wide and infinite. In fact, as cod fishermen in my part of the world will tell you, it is wide but not infinite. At least its resources aren’t. And that’s no different for beach glass. While it’s lovely to find some on your favourite sandy shores, there’s really not much available. And then there’s geography – when you are land-locked you need to come up with your own supply. Luckily, with a rock tumbler, you can do just that!
Sure, it’s not “authentic” but unless you are opening a chain of sea glass stores and misrepresenting yourself, who cares? Bonus: you get to smash stuff. See the instructions at The Comfy Crafter.