Hell on Earth: Gimme Shelter
The mineral known as "Ghost Rock" (or, more rarely, by its scientific name "spectracite") is a black, coal-like material with silvery white traces visible on its exterior. Ghost Rock is both highly porous and highly reactive giving it a number of unusual properties making it well suited for many industrial and chemical processes. Ghost Rock is incredibly energy-dense as a fuel; it burns much hotter and longer than coal, and, since its discovery, its use has led to a number of scientific discoveries.
When burned, ghost rock produces flame of varying colors depending on temperature and secondary reactive products. When burned, vapors escape from the rock only to burst into flames; this process produces a characteristic moaning noise that is now commonly associated with New Science technology. The white smoke produced from the flame often displays patterns that some individuals claim are unsettling. A common past-time is looking for "faces" in the smoke.
Ghost Rock also possesses several less desirable properties: it is toxic, and extended exposure can result in Ghost Rock Fever. It reacts with human skin to leave dark stains that do not disappear for days or weeks. Though the long term environmental impact of burning ghost rock is far less damaging than that of other carbon fuels, it can lead to black rain which is harmful to living things.
In the decades following the Civil War, Ghost Rock’s popularity as a fuel began to wane in favor of gasoline, up until the 1970s when an instability in the global oil market encouraged a switch back to ghost rock-powered vehicles and power plants. As the costs of electric vehicles dropped in later decades, and environmental concerns about “Black Rains” caused by excessive ghost rock usages grew, the pendulum started to swing away from pure ghost rock. Development of purely Ghost Rock powered vehicles slowed to a halt, and an industrial focus on ghost rock-infused gasoline, colloquially called "Spook Juice".
Hellstromme Industries successfully irradiated ghost rock in the 1960s. When irradiated, ghost rock loses its white streaks and gains a faint greenish glow.