Interesting Math History

Question :
What is 'Carat' ?

Answer :
In the Troy weight, which is used by jewellers in weighing precious metals and stones, a Carat is equal to 3.168 grains.
The term Carat is a variation of Carat and in form is used in comparing the parts of gold alloys which are in gold.
Abbreviation : ct or Kt
The word carat is derived from the Greek kerátio-n, fruit of the carob, via Arabic qi-ra-t and Italian.
The comparison is based on the use of 24 Carats to mean pure gold, and therefore 14 Carats to mean 14/24 pure gold by weight or 14 parts pure gold and 10 parts alloy.