related tags: 1D1F1E 1E1F1E 6C6D6A 6C6E68 7C857E 7E837F A0A6A4 A1A5A3 C2C9C4 C4C7C5 dillon district mesoproterozoic metamorphic mine mining montana ore precambrian proterozoic range regal rock rocks ruby soapstone steatite talc