Your school allows you to get a duplicate ID card? I wish my school would allow that even for a fee. I’ve locked myself out of a building after hours a few times. We have HID Seos+Prox cards, I made a copy to a T5577 card but most of the buildings around campus have antiquated Lenel magnetic stripe only readers.
Anyways, standard iClass can be cloned to a rewritable iClass card. You will need a Proxmark to write to it
The iClass Px card is a dual frequency card also supporting HID Prox. There’s a chance that the access control systems will also accept HID Prox and that would be cheap and easy to clone.
Honestly, I’d suggest just paying the $10 to get a duplicate.