Go through the The Hidden Cost of Jewelry Report to find out whether the company you are researching publishes information on the regional origin of the mineral materials they source.

If the company is not part of the Report, browse the Corporate Social Responsibility section of the company's Website and see if you can find information on the geographical origin of sourced gold & diamonds.

Usually, you will find this information on documents titled "Conflict Minerals” or "Responsible Sourcing" or "Sustainability Report".