Before you buy, confirm these four things: BIS Hallmark on the gold — confirms the gold's purity Diamond certification — ideally from a recognized lab like IGI Gold karat — 18KT is generally best for diamond settings, balancing durability and shine Brand reputation — buy from a trusted jeweller, such as Kesav Diamond Touch, that offers transparent pricing and certified jewellery ... https://kesavdiamond.com/search?q=Gold+and+diamond+mangalsutra