How you tell what you spent your crystals on? / How did I get that piece of gear?

(Just figured out how to submit bugs via Github and have submitted this bug on that side.)

Is there a ledger logging what you spent your crystals on? Asking because I got a shield (Painted Steel Shield) in Sarven Road that gave me enough HP…but I don’t recall purchasing it as when I goto other levels it does not show that shield being available.

So the questions are:

Did I actually purchase the shield?
If I did, where is it and why is it still locked?
If I didn’t, what bug is this where I got to inadvertently “borrow” equipment?

This link tells you what items you get for free, if the item isn’t listed here, then you are likely to have bought it.