Haul trucks deliver first mineralization to Isabella Pearl for processing. Image: Fortitude Gold. Fortitude Gold (OTCQB: FTCO) said on Wednesday it commenced operations at its County Line mine and made its first shipment of mineralization to its Isabella Pearl gold processing facility in Nevada. The Colorado-based company owns 100% interest in the Isabella Pearl mine located along a historic mining trend within the Walker Lane Mineral Belt. The property position covers approximately 9,000 acres. County Line ...