Non-metallic minerals are composed of chemical elements that don’t have the properties of any metals. This means they are not good insulators of heat and electricity, they lack malleability and ductility, and they break down easily. 

Non-metallic minerals simply do not serve as a raw material for the extraction of metals. They do not generate new products if they are melted. However, this diverse group of minerals are still of great economic significance.

Some examples of non-metallic minerals include building materials such as stone, clay and sand, salt deposits, natural gemstones, mineral deposits with essential chemicals and fertilizers among others. The materials used in the production of cement, ceramics, glass and lime products also fall under this group of minerals.