Luster is one of the physical properties used to identify minerals. It describes how light interacts with the surface of a mineral, and it can be described using terms like:

* Metallic: Shiny like a metal (e.g., pyrite, galena)

* Non-metallic:

* Vitreous: Glassy (e.g., quartz)

* Resinous: Like resin (e.g., amber)

* Pearly: Like a pearl (e.g., talc)

* Silky: Like silk (e.g., asbestos)

* Dull: No shine (e.g., chalk)

* Earthy: Like soil (e.g., hematite)

There are other more specific terms as well, but these are some of the most common.