"Grackle thinks it bad idea. Rope no go through bubble. So open shiny treasure first!!! Everyone likies shiny treasure!!! Then Grackle summon fuzzy scouts if Jill an' dwarfy too scared." the gnome says from inside his protective bubble. The sound is muted and a bit distorted, but Grackle looks eager, dirty little face squished up against the bubble and a silly grin, as usual, on his face.
After finding the passages and determining they having nothing to do with the chests, Jillian closes the trap door. Then she pulls out a coin and flips it twice. Then she puts the coin back up and moves to the silver chest. She takes her time and completely searches the chest once more for good measure. Then she opens it.
Opening the silver chest reveals a crystal box at the bottom of the chest. Inside you can see a silver ring. Zorn having no doubt maintained his detect magic, sees an aura of abjuration magic coming from the ring. The crystal box is likely of some value as well.