Crystals and Minerals

Crystals and Minerals

A Mineral is a natural, mainly inorganic substance that occurs on Earth, with a chemical structure and a crystal formation.

It differs from a 'rock' in that a rock can be an aggregate of many minerals.

There are over 5,300 known minerals in the world, of which, silicon and its derivatives make up more than 90%.

Other mineral groups include sulphides, oxides, carbonates, halides, sulphates, phosphates and native elements.

 

Agate

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