I wanted to ask if a husband can force his wife to sell the Jewelry she has got as gifts at her wedding against her will.If he is constantly demanding to sell it what should the wife do and what does our Deen say about this?

No he cannot force her to sell her jewelry. She can tell him that according to Islamic law, anything the wife owns is hers to keep and he has no authority to force her to sell it. She can ask him why he wants her to do that. If he is in a financial crisis it would be good for her to help him out. But if he is financially ok then she can keep her jewelry.