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Quick Answer. Non-metallic minerals are minerals that have no metallic luster and break easily. These are also called industrial materials and are typically some form of sediment. Non-metallic minerals are not malleable.
Non-metals. Oxygen, carbon, sulphur and chlorine are examples of non-metal elements. All non-metals have these properties in common: they are dull (not shiny). they are poor conductors of heat and electricity (they are insulators). they are weak and brittle (they easily break or shatter).Most non-metals have these properties: they have a low density (they feel light for their size).xygen, carbon, sulphur and chlorine are examples of non-metal elements. All non-metals have these properties in common: they are dull (not shiny). they are poor conductors of heat and electricity (they are insulators). they are weak and brittle (they easily break or shatter).