When you are selling second-hand jewelry, you must visit a second-hand jewelry buyer like New Sahdev Cash For Gold. Selling and buying jewelry is not something usual and easy. There are plenty of ways to sell but will they pay the amount you are looking for??
There are banks in the beginning, but banks do not buy back precious metals. They provide cash though in turn of loans against the precious metals. And they never pay 100% of the amount based on the market.
Next to is an auction market, which is never registered and does not know where tour item vanishes and you would not able to keep a record. If you are lucky, you can get a bigger amount but this is very much unpredictable and never a safe choice.
The third being the pawnbrokers; these act a wall among the customers and a resell market as they buy the jewelry on their own terms and sell to the second- hand jewelry markets like us. Therefore, they aren’t capable of paying you a full payment either.