This is a 1/6th scale version of the Fortress Crystal (aka The Crystal of Knowledge)
This is a five-sided Kryptonian crystal that can be used to create the Fortress of Solitude. The crystal contains all the knowledge of the planet Krypton and all the knowledge of the universe gathered by Kryptonians.
2.434 w x
1.766 d x
0.958 w x
0.695 d x