Patron Knowledgebase
Frequently Asked Questions
Everything you need to know about gold purity, hallmark codes, lifetime exchange, and custom orders.
BIS Hallmark is a gold purity certification issued by the Bureau of Indian Standards (Govt. of India). Every gold article sold at Santosh Jewellers carries a unique 6-digit alphanumeric HUID (Hallmark Unique Identification) code laser-etched onto the jewelry, which can be verified using the BIS Care Mobile App.