Here's a breakdown:

* Solid: Minerals are not liquids or gases.

* Inorganic: They are not formed from living organisms.

* Naturally: They are formed by natural processes.

* On or beneath the surface: They can be found in various geological locations, from the Earth's crust to deeper layers.

Examples of minerals include:

* Quartz: Commonly found in rocks and sand.

* Feldspar: One of the most abundant minerals in the Earth's crust.

* Calcite: The main component of limestone and marble.

* Diamond: A very hard mineral known for its brilliance.

* Gold: A valuable metal found in veins and deposits.

Note:

While minerals are the primary focus, there are other naturally occurring solid inorganic materials, like:

* Rocks: Aggregates of minerals.

* Glass: Amorphous solid formed from cooled molten materials.

* Ores: Rocks containing valuable minerals.

Let me know if you'd like to delve deeper into specific types of minerals or their formation processes!