Gotta watch out for those Guided by Voices fans, indeed.

Probably, since it appears to be manufactured mostly from petroleum-based sources:

“Modern graphite manufacture commences with a high molecular weight hydrocarbon, often natural pitch or a residue of crude oil distillation, which is first converted to coke by heating in the absence of air. This is long and complex process, usually taking several weeks to perform.”

https://nucleus.iaea.org/sites/graphiteknowledgebase/wiki/Guide_to_Graphite/Manufacturing and Production of Graphite.aspx