Studio Folio - Thunder eggs

For the shot of my choice I decided to do another macro shoot. I decided to capture the detail of thunder eggs, as they have some really interesting patterns and textures. I used my 100mm macro lens on my SLR. They were fairly hard to light as the surfaces are glazed and are reflective, so it was almost like shooting another glass object.
If it is suitable to submit, I want to crop sections of 4 or 5 shots and present them together, like the photo below, as I think it is more interesting than just submitting one.

I would really appreciate any comments or suggestions! Thankyou!

I have a fair few cross sections to choose from, so if you could let me know which ones are your favorites that would be great! If you specifically like one and think I should just choose that, let me know, as all of the crops obviously have more of the rock in them. Here is a bunch of my favorite cross sections.