Karat - Is a unit of measure of the amount of gold in a metal or a piece of jewelry. One karat represents 1/24th of an alloys total weight. 24 karat is pure gold, 22 karat is .9167%, 18 karat is .750%, 14 karat is .583% gold and 10 karat is .4167% gold.
Kilo or Kilogram - Greek word meaning 1,000. There are 1,000 grams in a kilo of silver. A kilo of silver weighs 32.1507 troy ounces.