rhodium
/ˈroʊdiəm/
noun
- A hard, silvery-white metallic chemical element that is very resistant to corrosion, often used in jewelry, catalytic converters, and electrical contacts.
- The jeweler explained that rhodium is more expensive than gold because it is so rare.
- Catalytic converters in cars use rhodium to help reduce harmful exhaust emissions.
- Many white gold rings are plated with rhodium to give them a bright, shiny finish.