What is the difference between 14 and 18 carat gold?

The difference between 14 and 18 carats is the percentage of pure gold. 18 carat gold is 18 out of 24 parts gold and is yellower and warmer in appearance – if you pick yellow gold, that is. Rose gold will look best at 18 carats, for instance. 14 carat gold contains a lower percentage of gold, making it somewhat more affordable, but also more resistant to wear and with its own quality appeal.