Empty Crystal
A rhombus-shaped crystal made from glass that has complex circuits embedded. It seems powered down, maybe it could be fed data to activate it again?
Use: Combine the materials
Materials
Empty Crystal is an item in Core Keeper, in the Recipe category. It is crafted from 5 Ancient Gemstone, 5 Mechanical Part. It is sold by the Cloaked Merchant for 3000 Ancient Coins, once the boss statues hold Glurch Eye, Ghorm's Horn, Stolen Crystal Heart.
How to get
Sold by
Price per item in 
Ancient Coin.
