technology.ieo on Instagram: "Glass begins as something incredibly ordinary: sand. More specifically, silica sand rich in silicon dioxide. When heated inside an industrial furnace to temperatures above 1,700°C, the sand doesn’t burn — it melts. At that extreme heat, the rigid crystal structure of silica breaks down, turning the grains into a glowing, molten liquid. Additives like soda ash lower the melting point, while limestone improves strength and durability, allowing the molten mixture to be