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As one of the properties in minerals, there are different types of luster as there are different mineral categories. Luster is divided into two categories namely nonmetallic and metallic. Metallic minerals tend to have a shiny and opaque appearance. There are various sub-categories of luster in nonmetallic minerals.
Nonmetallic Luster. There are a number of different nonmetallic lusters. A. Vitreous. Also called glassy. Examples include quartz and tourmaline. B. Resinous. Minerals that look like resin (a little bit like the look of plastic). Examples include sulfur and sphalerite. C. Pearly. Minerals with a pearl-like, iridescent luster. Talc is a good example.