Example of Luster

Luster is literally the gleam of gold. It's a shining effect, and used as a metaphor it describes an image of something of value, real or imagined. The fascination of gold's luster is the analogy. In technical terms, luster is also another word for a shining effect, usually a superlative rather than an actual description. It can also be a metaphor for the image of an idea or a reference to a personal image.

Examples of Luster:

The luster of gold lures people.
The luster of the car's finish was dazzling.
The idea of being a standup comedian lost some of its luster.
https://en.wikipedia.org/wiki/Lustre
https://csmres.jmu.edu/geollab/fichter/Minerals/luster.html
https://geology.csupomona.edu/alert/mineral/luster.htm
https://simple.wikipedia.org/wiki/Luster_%28mineralogy%29

Image Example of Luster:

Adamantine lustre(Cut diamonds)

Dull lustre(Kaolinite)