Who discovered glass?
Natural glass (obsidian) has been used since the stone age. Manmade glass dates back nearly 5000 years and was probably discovered either by the ancient Egyptians, by people living in what is now Syria, or people living in Mesopotamia.
Glass was first "created" for human use by the Syrians and then later by the Romans. More specifically, according to Pliny the Elder, it was the Phoenicians that first invented glass. Glass blowing was invented by the Syrians in the 1st century BC. Another opinion Glass wasn't invented, it was discovered "by Mesopotamians near 35000BCE..."
Ancient humans discovered that they could see their reflections in shiny metal. They began to polish metal disks on purpose and make mirrors. This was the sort of mirror people had for thousands of years until they learned how to make glass. Then, scientists learned to coat the back of a piece of glass with silver to make an even better reflection.
Volcanic glass or obsidian maybe gave someone the idea. Or, maybe, the nodules of glass that can form when lighting goes to ground through sand. In any event, glass is made by heating sand until it melts. Actually, the sand particles have to be separated first. If you just melted sand you would get a dark, non-transparent glass. You have to find the clear crystals in the sand to make glass. It is then melted…