What's the Difference Between a Karat, Carat, and Carrot?

The purity of gold is measured in 24ths called karats. 24K gold or 24-karat is 100% pure gold. 18K gold or 18-karat is 75% pure, and 14K or 14-karat  is 58.3% pure. The value of gold can further be determined by its rarity of structure-- whether it is a nugget or wire gold or has specimen value.

Gemstones are weighed by the carat (notice the difference in spelling) -- which is 200 milligrams or one-fifth of a gram. There are 5 carats in a gram. In addition to weight, the value of gemstones is also set and judged on their color, clarity, and cut.

If you're hungry, choose a carrot!