Decorative Blocks
Mine Cells adds lots of decorative blocks to make the structures as close to the source material as possible. Feel free to go into creative mode to check them out, and use a mod like REI to find out if they're craftable or if you have to hunt for them in the dimensions of Mine Cells!
Putrid Wood
Tip: The thin Putrid Boards (top right in the screenshot) can have their variant changed by right-clicking them with any axe.
Prison Stone
Miscellaneous