Yes that's right, the base metal element lead, Pb, or more exactly the lead-based chemical compound Pb(CH2CH3)4 added to petrol to make car engines run more smoothly.

BBC: Does lead poisoning make you violent?

Executives said Tuesday they're also developing a foundry designed to produce metal parts from nickel, an element abundant in asteroids, and operate in space, and a class of "Harvestor" craft to extract valuable material from the asteroids.

CNN: 'Fireflies' to scope out space rocks for mining

Scientists have found that blackening the element using lasers can transform the metal's properties.

BBC: Copper wire

The copper element is designed to reflect Cornwall's history of mining the metal.

BBC: Cornwall