What is a mineral?

Question

minerals are solid substances that are found in rocks. Some rocks contain only one mineral, but generally rocks consist of a number of minerals. Different minerals are identified by a variety of factors, including their characteristic crystalline formation and their hardness. Although some can be identified by color, many are white or colorless or, like amethyst, occur in a variety of shades.

Answer 1

Sounds like you just answered your own question!

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Answer 2

You answered your own question. For some other information to add to that examples of a mineral are gold, platium, timber, iron ore, alumium, etc. It also isn't a gas or liquid.