New Delhi, Nov. 7 -- Diwali is one of the biggest occasions for buying gold jewellery in India. While many households prefer purchasing new ornaments during the festive season, exchanging old gold for new designs can be a convenient way to upgrade jewellery without paying the entire cost upfront.

However, exchanging old jewellery is not necessarily the same as getting its full market value. The amount a jeweller offers depends on several factors, including the purity of the gold, its net weight, deductions for stones and other materials, melting charges and the jeweller's exchange policy.

Even a small difference in the valuation can affect how much a buyer ultimately pays for the new jewellery. Before handing over old ornaments this Diw...