Define non-metallic mineral?

Non-metallic minerals are minerals that do not contain metal elements in their chemical composition. These minerals are typically used for industrial purposes, construction, and as raw materials for various products. Examples of non-metallic minerals include limestone, gypsum, quartz, and mica.

A non-metallic mineral is a naturally occurring solid, inorganic substance that is not a metal, and is obtained from the earth's crust. It typically does not contain metallic elements or only in small amounts. Non-metallic minerals have diverse physical and chemical properties and are used in a wide range of industrial, construction, and decorative applications. Examples include:

- Precious and semi-precious gemstones (e.g., diamonds, rubies, sapphires, emeralds)
- Industrial minerals (e.g., sand, gravel, limestone, clay, gypsum)
- Minerals used for fertilizers (e.g., potash, phosphates)
- Minerals used in ceramics and glass (e.g., quartz, feldspar, kaolin)
- Minerals used in paint and dyes (e.g., titanium dioxide, pigments)