Costas,
I would like to add my positive comments to those posted before me. Well conceived, and well executed.
I was wondering if you had a picture of the piece without the black background, in normal lighting.
While I certainly support an artist's right to display his/her work as they see fit, I will also admit that I am not the biggest fan of the black background. I can appreciate the dramatic impact it lends to certain pieces. You seem to use it for most/all of your works, or at least those posted here, and appear to have mastered the lighting conditions necessary to produce consistently impressive images.
Thanks, again, for sharing your work with the PF community!
Don