soapstone (late mesoproterozoic, 1.1-1.3 ga; regal mine, ruby range, montana, usa) 6 color palette

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#6B696D #1E1E1A #A6A9A4 #C3C9C1 #807E81

related tags: 1D1D1B 1E1E1A 6B696D 6B6A6C 7F7F80 807E81 A6A8A5 A6A9A4 C3C9C1 C4C7C3 dillon district mesoproterozoic metamorphic mine mining montana ore precambrian proterozoic range regal rock rocks ruby soapstone steatite talc