1. Naturally Occurring: Minerals must form naturally through geological processes, not in a laboratory or by human intervention.
2. Solid: Minerals exist as solids at room temperature and pressure. While some minerals can be liquid or gaseous under extreme conditions, they are classified as minerals based on their solid state at normal temperatures.
3. Inorganic: Minerals are not formed from living organisms or organic processes.
4. Definite Chemical Composition: Minerals have a specific chemical formula that defines their composition. While there can be slight variations, the primary elements and their ratios remain consistent.
5. Ordered Internal Structure (Crystalline): Minerals have a highly ordered arrangement of atoms in a repeating, three-dimensional pattern. This crystalline structure determines many of the mineral's properties like shape, cleavage, and hardness.
6. Homogeneous: Minerals are uniform throughout their composition and structure. They don't have distinct parts or phases with different properties.
Here's a summary:
| Property | Description |
|---|---|
| Naturally Occurring | Formed through geological processes. |
| Solid | Exists as a solid at room temperature and pressure. |
| Inorganic | Not formed by living organisms. |
| Definite Chemical Composition | Specific chemical formula with consistent elements and ratios. |
| Ordered Internal Structure (Crystalline) | Atoms arranged in a repeating, three-dimensional pattern. |
| Homogeneous | Uniform composition and structure throughout. |
Note: While these are the fundamental properties, there are some exceptions and nuances. For example, some minerals may be amorphous (lacking a crystalline structure), or some may have variable compositions. However, the above criteria provide a solid framework for defining what constitutes a mineral.
