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 Wow, well chat GPT pretty quickly seemed to spill the beans on iron oxide being particularly dangerous https://chat.openai.com/c/f9277022-28c9-4c49-be4d-1c09a7d68512 
 Iron oxide is just rust. It's not very reactive so I have my doubts but I'm not very knowledgeable on the topic. 
 True, but there are some other basic oxides that react to form metal glass like lead glass, and there is some research on iron oxide bonding to the surface of silica. Swinging in the dark here but interesting little exploration nonetheless https://www.sciencedirect.com/science/article/abs/pii/S0927775709006591