The Jewel Case is a furniture you can build (the Indoors page).
In-game description
A glass case on a velvet cushion, with a place for each land's Jewel. Those you've won shine in it.SHOWN IN THE BUILD RING
Building it
It costs 3 
Wood, 2 
Stone, 1 
Bronze Ingot, 3 
Glass, 1 Fire 1 Water 2 Earth spirits. It needs 1 Jewel first. Take it down with DISMANTLE to get its cost back (see Building).
