Minerals always occur in nature, they are solid and are inorganic. They have a crystal structure and each mineral has a unique chemical composition.

Are all minerals solid?

Solid. Though minerals vary in shape, color, luster (the way a mineral reflects light) and hardness, all minerals are a solid at a given temperature. If a substance is not in its solid state, it is not currently a mineral. ... Diamond is the hardest mineral.

Is mineral must be solid?

For a substance to be a mineral, it must be a naturally occurring, inorganic, crystalline solid that has a characteristic chemical composition and crystal structure.