How to check silver purity when buying the metal this Dhanteras?

Silver is a popular purchase during Dhanteras, with households buying coins, utensils, jewellery and religious idols as part of the festive tradition. Bureau of Indian Standards (BIS) hallmarking and Hallmarking Unique Identification (HUID) verification help buyers check the metal's purity. The recognised BIS purity grades for silver artefacts are 800, 835, 925, 958, 970, 990, and 999.