One thing I found interesting when visiting the Bahamas is that every few years some entrepreneurial locals pitch the idea of using the sand from the beaches to

One thing I found interesting when visiting the Bahamas is that every few years some entrepreneurial locals pitch the idea of using the sand from the beaches to turn it into glass. Only problem with that: the "sand" is made up of crushed coral and seashells (probably some limestone in there, too), so it's not possible to furnish glass from it.