Why is coal not classified as a mineral?

It is not a solid.

It is does not occur naturally.

It has no crystal shape.

It is made of organic material.

It is made of organic material.

Explanation:

A mineral is a naturally occurring, crystalline, or abiogenic chemical compound. A particular chemical composition is found in a rock. Carbon is not a mineral because it is organic and a mineral that has a crystalline structure repeatingly.

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Coal is not classified as a mineral because it comes from organic materials.

Explanation:

Minerals are naturally-formed substances that have a specific chemical makeup. They are created when elements combine. Minerals are non-organic and most have a set crystalline structure. Examples of minerals include diamond, azurite, beryl, and pyrite.