Mineral (chemistry)

The video explains that minerals are naturally occurring substances with a crystalline form, produced by geological processes, and have a precise chemical composition. Unlike rocks, which are mixtures of various minerals, minerals are distinct in their composition. Examples provided include quartz, composed of silicon dioxide, graphite, which is pure carbon, and gypsum, a form of calcium sulfate.

What is the significance of a precise chemical composition in minerals?

What is gypsum composed of?