Sapphire key

[Axiom]

I've picked up two of these somewhere, and even though I've cleared the entire Rivertown map (excluding Storm Castle because I want to do side quests first) I still haven't found a use for them. So I'm just curious - what are they for?

[Raze_Larian]

Most likely they are for a chest or door that you lockpicked before you found the keys.

[Axiom]

Автор сообщения: Raze_Larian

Most likely they are for a chest or door that you lockpicked before you found the keys.

I didn't lockpick anything at all because I didn't invest in that skill. I just thought that, because these keys look so different from normal silver keys, there's something special about them.

[Raze_Larian]

If there is something special about the keys, there may have been a backup method to open the associated lock, or you may have missed something.
You can try going through a walkthrough[www.gamebanshee.com] and search for 'sapphire' (there is one in the Aleroth catacombs for a door you may not have gone back to, one in Ars Magicana though close to the chest it opens, etc).
I don't know if anyone ever compiled a list of keys and the locks they open. There was a Aleroth KEYS map[larian.com] topic, but the links to the screenshots are dead.

I did learn Lockpick, and before the end section of the game had a dozen or more keys in my inventory that I got rid of.