How to Purify Gold | Sciencing
Aug 30, 2017· If a piece of gold jewelry is labeled as having less than 24 karats (, 14 karats), it means the jewelry piece is an alloy containing other metals in addition to gold to make it stronger. Gold dust and flakes obtained from prospecting is known as "fine" gold and it usually contains some impurities that need to be flushed out with a flux mixture.