Iridium is the most strongest, rarest, densest, expensive, lightest metal ever known
Tungsten.
diamond
Titanium can be formed/molded
well, the earths crust is the hardest cause its made of rock and metal formed together.
Diamond is not a metal, it is a mineral: the hardest material on earth.
All metals tend to conduct electricity. For the cheapest but hardest I would suggest high speed steel (HSS). It's not the hardest or the cheapest but is a good compromise.
diamond is the hardest thing on earth
The hardest matter on earth is Diamond.
Beryllium is the hardest element in group II, at 5.5 on the Mohs scale. The hardnesses decrease as you go down the group, until barium has a hardness of 1.25.
Diamond is the hardest mineral on earth.
Lutemium
There is no metal by the name 'thompson'.