Like the low key. could use a bit more contrast and more focus, to bring out the rest of the image. I can tell the focus is on the smooth, but I would like all of it with more detail.
There is enough detail on the smooth object to see that it is perfectly focused, in contrast to the rough material. This parallels the contrast between rough and smooth that is the subject of the photo, adding depth to the meaning of the image. Well done.
I see what you're trying to achieve here but you needed some rough stuff in focus. I would also have tried to fill the frame with that material too as the surrounding background is not helpful. Lighting from one side (rather than above, middle) would also prevent the glaring central highlight and create more atmosphere.