How is glass made?
Glass is quite amazing. It is made of three different minerals. You start with sand which is heated to a very high temperature so that it becomes liquid. Soda ash, a powdery white material, is used to lower the melting point of the sand. Limestone is then added to make it stronger.
- Sand (silica)
- Soda ash (sodium carbonate)
- Limestone (calcium carbonate) = Glass