I always define a polish by the degree of angle required to see reflection in the surface. If you can stair straight down into the surface and see reflection you have a highly polished surface. If, however, you have to stand farther back at a wider viewing angle then the surface is less polished.
Another often over looked aspect of a polished surface is the clarity of the reflection. A surface and be shiny, very shiny even, and not be a very good polish. That is because in those instances you cannot see the details of the items being reflected in the surface.
On a highly polished countertop you should not just be able to see the lights above the counter but the details of the lighting fixture. Sometimes, as pictured here, you can even see the details of the light bulbs.
By Josh Huseby 10-15-2018