Description: Centennial Eureka Mine (Blue Rock), Tintic District, East Tintic Mts, Juab Co., Utah, USA Mcalpineite on quartz FOV = .75mm Nikon D300 on PB6 bellows with 10X Nikon finite conjugate objective. 86 frames at .005mm steps, stacked with Zerene Stacker, and cropped from full image.

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