* Inorganic: It means that it is not made by living organisms.

* Crystalline: It has a definite internal structure, often with a repeating pattern of atoms. This can be seen in the shape of the mineral or in how it breaks.

* Solid: Minerals are not liquids or gases.

* Naturally occurring: Minerals are found in nature and haven't been created in a laboratory.

* With a definite chemical composition: Most minerals are made up of specific elements and compounds.

Let me know if you'd like more details about any of these characteristics!