Can minerals have a metallic or a nonmetallic luster?

Yes, minerals can exhibit either a metallic or a nonmetallic luster. Metallic luster gives a mineral a shiny, reflective appearance similar to that of metal, while nonmetallic luster can vary from glassy, pearly, or dull to earthy. The type of luster is determined by the mineral's surface properties and how it interacts with light. Examples include pyrite with a metallic luster and quartz with a nonmetallic luster.