In Chapter 102 'Celebrant' Kaladin sees,
"And sitting in a locked, glass-topped box, a long thin silvery chain."
Selling for a thousand broams of stormlight.
Just wondering if this was her necklace. Also aluminum seems to work as a barrier preventing stormlight from going through, but not around it. Nightbloods sheath, the room in Kolinar for soulcasting, etc.