What is 10 karat gold filled?

gold and something else, usually copper or brass 24 karat gold is pure unrefined gold. Gold is smelted with other minerals to make it harder and stronger, because it wears down fast. !8 karat gold is made of 18 parts gold and 6 parts alloy. 14 karat is 14 parts gold and 10 parts alloy. 10 karat is 10 parts gold and 14 parts alloy. This is used for rings mostly due to it is more resilient to wear and tear. necklaces are made of less strrong metals. usually 14 or 18 karat.