Differences between 22k and 21k gold are their purity levels.
22k gold has 91.6% pure gold.
21k gold has 87.5% pure gold.
22k is Softer.Â
21k is stronger.
22k Gold used for heavy Jewellery such as Kara Pairs , Necklace Etc.
21k Gold used for earrings , Tops , Finger Rings , Chains etc.