carat
/ˈkɛrət/
noun
- A unit of weight used for gemstones, equal to 200 milligrams.
- The diamond in her engagement ring weighs one carat.
- A 2-carat ruby can be very expensive.
- Jewelers measure small gems in carats to determine their value.
- A unit of purity for gold, equal to 1/24 part of pure gold in an alloy (often spelled 'karat' in the US).
- Pure gold is 24 carats, but it is too soft for most jewelry.
- This necklace is made of 18-carat gold.
- The ring is stamped with '14K' to show it is 14 carats of gold.