Rust and scorpions safe?

[Javi]

yo guys is it safe that i picked up a rock from my school and it has small specks of rust looking substances. I did wash it and its dry now. My question is is it safe for my scorpion to hide in????

 

[Dry Desert]

yo guys is it safe that i picked up a rock from my school and it has small specks of rust looking substances. I did wash it and its dry now. My question is is it safe for my scorpion to hide in????

It may be something else but is probably Iron Ore so I wouldn't chance it.