The manner in which light reflects from a mineral surface. Metallic, submetallic and non-metallic are the basic types of luster. Luster refers to the general look of a mineral in reflected light. Minerals are divided into two types: metallic and non-metallic. There’s no clear dividing line between the two. In general, non- metallic minerals will transmit light through a thin edge, are light coloured, and will have a light or colourless streak. Non- metallic minerals are further described as: vitreous, resinous, pearly, greasy, silky, adamantine.
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