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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.
1 Metallic-looks like shiney metal. 2  Non-metallic-all the other ways that a mineral can shine. 3  Glassy/vitreous-shines like a piece of broken glass (most common non-metallic). 4  Dull/earthy-no shine at all. 5  Resinous/waxy-looks like a piece of plastic or dried glue. Glassy/vitreous-shines like a piece of broken glass (most common non-metallic). 2  Dull/earthy-no shine at all. 3  Resinous/waxy-looks like a piece of plastic or dried glue. 4  Pearly-looks oily it may have a slight rainbow like an oil slick on water.