There is no mineral that is used for all electrical instruments, but in the computer hardware business, silicon is a very important component, as it is used in many computer parts.
A California mineral that is used in making electrical equipment is silicon. Silicon is used as a conductor of electrical impulses and also as a receptor in the makeup of a computer. Silicon chips can hold a multitude of information.
Copper
Image result for What is the mineral copper often used to make electrical wires? Because of its superior conductivity, annealed copper became the international standard to which all other electrical conductors are compared. The main grade of copper used for electrical applications is electrolytic-tough pitch (ETP) copper .
The regular mineral lead Is used for making pencils and other things
Wires are generally not comprised of minerals, but metals. Examples are copper, aluminum, and gold. There are some insulation systems that use "rock wool" (which is mineral based), for high temperature or high radiation exposure.
aluminium is used for making electrical cables as the metal do not melt easily
Copper
It's petroleum
gypsum
Not a mineral but a metal- copper.
Reed
some mineral resources are used for making tin. this is used for making tins like tin of milk,tin of cocoa.other mineral resources are; iron gold copper and so on and so forth