Carat (ct) is a unit used to measure the purity of gold. Pure gold, also known as 24-carat gold, is very soft and malleable. Therefore, for jewelry making, it's usually alloyed with other metals ...
Last month the price of gold hit a record high, pushing above $2,000 (£1,575) an ounce. While this price rise was driven by gold traders, it begs the question about the supply of the precious ...