Understanding the difference between 22K and 24K gold helps you make a better decision when buying jewellery or investing in gold. This guide explains gold purity, durability, colour, and practical uses of both karat types. Learn why 22K gold, with 91.6% purity, is widely used for jewellery, while 24K gold, with approximately 99.9% purity, is preferred for coins and investment bars. It also explains the meaning of the 916 hallmark and shares essential buying tips, including checking the BIS hallmark, daily gold rates, making charges, and itemised invoices before making a purchase.