I agree somewhat with #366550....although my comments are...would look a lot better if you had a limited color palette....this is too busy, not a fan of the multi-colored necron mini...doesn't work for me
I really like the green you have pulled off here, and especially the carapace and the shading of the skull work very well. And you're quite a sculptor creating that skull - well done.
However, the metal on the mini seems a bit busy to me, and I think the model would work better with fewer different metals instead of both gold, copper and steel.