Penumbrite Ore

Location
Fairly deep underground on Penumbra planets, you'll find this ore. It glows with a full purple and should be easy to locate in the darkness.

Smelting
You'll need an Fission Furnace or higher to create Penumbrite Shards. Four ore will smelt into one shard.

Uses
Penumbrite is an extremely hard ore and as such is very useful in creating Penumbrite Shards for equipment. Most often turned into plating, there are various weapons and mining lasers that require shards for crafting. This means you will need a great deal of Penumbrite if you intend to do much crafting in Frackin Universe.