Siddhartha Assaying & Hallmarking Centre is where hallmarking began, and we have been testing and hallmarking precious metals for over the years. At the Siddhartha Assaying & Hallmarking Centre, we provide both traditional handmarking and the latest laser marking techniques.

The BIS system of hallmarking of gold jewellery began in April 2000. The standard specifications governing this system are IS 1417 (Grades of Gold and Gold Alloys, Jewellery/Artefacts),IS 1418 (Assaying of Gold in Gold Bullion, Gold alloys and Gold Jewellery/Artefacts), IS 2790 (Guidelines for Manufacture of 22, 18 and 14 carat Gold Alloys), IS 3095 (Gold solders for use in manufacture of jewellery).

The BIS hallmark

BIS hallmark for gold jewellery consists of several components:

  • The BIS logo.
  • A three digit no.Indicating the purity of the gold in part-per-thousand-format viz 916, 750, and 585 Thus a BIS 916 hallmark would certify to a purity of 916 per 1000 that is 91.6%, translating to a 22 carat purity of gold.
  • Logo of the assaying centre.
  • Logo of the jeweller.
  • Assaying & Hallmarking Centres

The testing of the jewellery as well as the marking is done in approved Assaying & Hallmarking Centres across the nation. These are private undertakings approved as well as monitored by the BIS.
Legal status

The mandatory status of hallmarking gold jewellery sold in India, although declared, is yet to be implemented. But it has a wide acceptance among consumers. This often leads to fake hallmarking of jewellery which is under the regular scrutiny of the bureau