Wahala Facts: 16 most expensive materials on earth

14. Rhodium is a chemical element that is a rare, silvery-white, hard, and
chemically inert transition metal and a member of the platinum group.
Rhodium is used in jewelry and decorations.It is electroplated on
white gold and platinum to give it a reflective white surface.Rhodium
has also been used for
honors or to symbolize wealth, when
more commonly used metals such as
silver, gold, or platinum are deemed
insufficient.Rhodium is used as an alloying agent
for hardening and improving the corrosion resistance of platinum and
palladium. These alloys are used in furnace windings, bushings for
glass fiber production, thermocouple elements, electrodes for
aircraft spark plugs, and laboratory crucibles. It is sold for about
$60/gram