When you file bankruptcy you will list all of your assets, meaning everything you own. This includes your jewelry. 

When a person files for bankruptcy, their property is considered exempt, protected from creditors under the law, or non-exempt, not protected from creditors. In a Chapter 7 bankruptcy case, the debtor is required to give any non-exempt property they have to the trustee to be included in the bankruptcy estate and used to pay creditors or enter into an agreement with the trustee, wherein they agree to pay the trustee to keep the non-exempt property.