Hallmark gold is the certificate issued for the purity of gold. Buyers of gold should always check the purity of gold while purchasing. Hallmark, 916, etc indicate the purity of gold and it helps both the buyers and sellers. Hallmark certification is done by the Bureau of Indian Standards(BIS) and is recognised by the Government of India. The certification of gold is done based on the rules and regulations of BIS Act. The laser engraved details are available in the hallmarked gold.