This is a cube recipe for storing gems.
Any perfect gem in cube = Gem bank of that specific gem (perfect ruby in cube = perfect ruby bank with 1 perfect ruby in bank)
Gem bank + pgem = Puts the gem in the bank (Perfect ruby bank + perfect ruby = Perfect ruby in the bank)
Gem bank in the cube = pulls out 1 pgem from the bank (Perfect ruby Bank in the cube = Perfect ruby bank + 1 Perfect ruby gem)
This works only on perfect gems and skulls.