Druidium

Druidium is a precious metal that is the new “super fuel” that replaced carbon fuels years ago. Each rock works like a magical battery, providing massive amounts of energy when many of them are connected together. These rocks power just about every new form of tech from vehicles, weapons, medical equipment, and more.

Appearance
A Druidium stone has a dark purple tint to it, and a gentle glow when charged with magical essence. While common stones are purple, there is a rare super variant of Druidium that's more of a rich shade of green.