There are many hallmarking centre in India. In fact every major every major Town will have 4-5 Govt approved Hallmarking centre for their Jewelry to get tested.
Hallmarking cost are not much and vary from place to place. In general it costs around Rs. 30-35 per piece of jewelry.
Among them “916”, “750”and “585” are commonly used in Gold Jewelry in India.
Government of India has identified BIS a sole agency in India to operate this scheme. BIS hallmarking Scheme is voluntary in nature and is operating under BIS Act, Rules and Regulations. It operates on the basis of trust and thus it is desirable that aspect of quality control are in built in the system responsible for managing quality.
A hallmark is an official mark or series of marks struck on items made of metal, mostly to certify the content of noble metals—such as platinum, gold, silver and in some nations, palladium.