Cement Decor?

[Salem13]

I have made backgrounds and general decor for my fish tanks using cement. This got me wondering- could this be used in a hamster enclosure?
I imagine if it was used in a way to create some sort of cliff-inspired shelf or climbing area would be good at filing their claws down. The texture would also likely be a neat addition. The only possible danger I can think of is that they may chew on it and swallow bits of rock- which is obviously not good. They could also possibly chip a tooth if they were determined to chew it as well.