Gold is a yellow metallic element, but in its pure form it is too soft to be used for general jewellery purposes. Therefore, most gold jewellery needs to be alloyed with other metals to provide the best combination of strength, appearance, and resistance to tarnishing.
24 Carat Pure, rich, 100% gold.
22 Carat High quality with a wonderful colour, 22 carat contains 91.7% gold. Alloyed with silver and copper.
18 Carat 75.0% gold, alloyed with silver and copper.
14 Carat Containing 58.3% gold, 14 carat is an improvement on 9 carat, however it can still tarnish and become brittle. Alloyed with silver, copper and zinc.
9 Carat Containing 37.5% gold, 9 carat consists of more base metal than gold. Like copper it tarnishes and may turn green or black, having the same effect on your skin or clothes. 9 carat is alloyed with silver, copper and zinc.