I really like the concept and subject matter here!
The colours are absolutely exquisite and the material makes it even more interesting as it reflects and refracts things. I like the square and the shallow depth of field so that the main subject matter stands out and all.
I don't really have any suggestions to make for improvement.. I mean, you've balanced it out quite well and I like the whole composition of things too.
It's a shame about the noise, but other than that, it's a pretty cool shot indeed.