What distinguishes a mineral from a rock?

What distinguishes a mineral from a rock?

• A. A mineral is a naturally occurring inorganic solid with a definite chemical composition and crystalline structure.
• B. Rocks are made of a single mineral.
• C. Minerals are always synthetic.
• D. Minerals are never solid.

Answer: (A)

The main idea here is that a mineral is a natural, inorganic solid with a definite chemical composition and a crystalline arrangement of atoms. Because of this crystal structure, minerals have a fixed formula and a repeating internal pattern that gives them consistent properties. Rocks, by contrast, are mixtures formed from one or more minerals (and sometimes other materials) and come together through geological processes. A rock can contain several different minerals, like granite with quartz, feldspar, and mica, so it isn’t defined by a single chemical formula or crystal lattice. Minerals are not synthetic and they are solid, so the other statements don’t fit.

The main idea here is that a mineral is a natural, inorganic solid with a definite chemical composition and a crystalline arrangement of atoms. Because of this crystal structure, minerals have a fixed formula and a repeating internal pattern that gives them consistent properties. Rocks, by contrast, are mixtures formed from one or more minerals (and sometimes other materials) and come together through geological processes. A rock can contain several different minerals, like granite with quartz, feldspar, and mica, so it isn’t defined by a single chemical formula or crystal lattice. Minerals are not synthetic and they are solid, so the other statements don’t fit.