What is Gold Purity (24K, 22K, 18K, 916)?
Gold purity is measured in Karats (K), indicating how many of 24 parts are pure gold. 24K is 99.9% pure gold; 22K (91.6% pure, marked "916") is the standard for Indian jewellery; 18K (75% pure) is common in modern, more durable jewellery designs.
24K gold is too soft for jewellery and is used mainly for coins, bars, and investment purposes. 22K and 18K gold are alloyed with metals like copper or silver for added hardness and durability, making them suitable for daily-wear jewellery. The number "916" stamped on jewellery comes from 22 ÷ 24 × 1000 = 916.
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