Hallmark Unique Identification (HUID)

➖ A six-digit alphanumeric code, or one that consists of numbers and letters.

➖ It is given to every piece of jewellery at the time of hallmarking and is unique for each piece.

➖ Jewellery is stamped with the unique number manually at the Assaying & Hallmarking (A&H) centre.

➖ The hallmark consists of three symbols which give some information about the jewellery piece.

➖ The first symbol is the BIS logo; the second indicates purity and fineness; and the third symbol is the HUID.

➖ Hallmarking & HUID are mandatory for 14-, 18- and 22-carat gold jewellery and artefacts.