Looking better and better. Nice work.
What did you do to the floor -- is it just a colored texture, or is it some kind of light effect from the dome?
I would make the geode texture in the stones even bolder and more dramatic...is it possible to have the textures themselves multicolored within each pane? Orange center with blue outside and white streaks, that kind of thing?
Also, is it possible to remove the frame and have just the stones pressed together? Maybe that would require a new model, though.