I just discovered that sea glass looks pretty cool just sitting in one of my old Atlas jars with some seashells on my windowsill.
I also discovered that some places sell cheap fake sea glass... By that I mean it's sharp-edged and obviously just flat frosted glass that's been broken up and poorly tumbled. I just saw the bag at the store at a great price, thought "Cool!" and didn't notice till I got home and dumped it out. Disappointing.