Cobalt is a chemical element; it has symbol Co and atomic number 27. As with nickel, cobalt is found in the Earth's crust only in a chemically combined form, save for small deposits found in alloys of natural meteoric iron.

Coltan is short for columbite-tantalite, a dull metallic ore. When refined, coltan becomes a heat resistant powder, metallic tantalum, which has unique properties for storing electrical charge.

Lithium, often referred to as "white gold" due to its market value and silver colour, is one of the most sought-after minerals globally due to its high energy density feature and longer life span.

Copper is a chemical element with symbol Cu and atomic number 29. Classified as a transition metal, Copper is a solid at room temperature.