One of those times when both characters are playing “guess the meaning of the word from context” — and both getting it not-quite-right.
Leif: It’s okay, sir!
Thorn: You’re shaking! Let me see.
Leif: It’s only a normal “don’t touch” compulsion for servants. I should have known better. The shock will heal in a few minutes.
Thorn: Do you want help with that?
Leif: Um . . .
Thorn: A guy in my line of work isn’t going to walk around without a healing gem on hand. It’s “sapphire” in Ceanska.
Leif: Lapis lazuli?
Thorn: Sounds right!