who can provide this to me?
Since you are able to post this in a forum from a working device with internet access you should be located somewhere where pawn brokers and jewellery shops are available. Why not post the details of what you are trying to pawn first before posting?
Another point is that you will face difficulty in sending the collateral to the lender/escrow at this lockdown, so a better option if to find a lender who lives close to you.
However if you are looking to sell that stone you should visit the "Marketplace" section.