Rhodium was discovered at the same time as palladium in 1803. The name is derived from he Greek word "rhodon" = rose, and refers to the deep pink color of many rhodium compounds. Rhodium is a silvery-white precious metal, and is very hard (harder thatn gold, silver and platinum).
It is one of the rarest elements, and is used e.g. for alloys in the glass industry, for glasses, watch cases and jewelry.
The metal fittings of the Guilloche series in the Graf von Faber-Castell Collecton are plated with high-quality rhodium. A fully rhodium-plated version is also available.