Graphite

Overview
Graphite is an element used in the Molecular Forge as one of the inputs for producing Fullerene. It is also a refinement product from Fullerene in the Rock Crusher, making it part of a loop between late-game material processing machines.
In the Molecular Forge, 90 kg Graphite + 5 kg Sulfur + 5 kg Aluminum = 100 kg Fullerene. In the Rock Crusher, 100 kg Fullerene = 90 kg Graphite + 10 kg Sand. This makes Graphite a direct feedstock for Fullerene production and a recoverable output when Fullerene is broken down, though the Crusher process also consumes some of the input as Sand.