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Title: Autunite, a Uranium Ore
Caption: Autunite is calcium uranium phosphate, a distinctive green mineral that forms sprays of flat crystals that resemble wheat sheaves. This mineral is radioactive and also highly fluorescent. It glows bright green under ultraviolet light. This photo shows a specimen from the Daybreak Mine near Spokane, Washington, under normal illumination.
Credit: Album / Science Source / JOEL AREM
Image size: 3717 × 2550 px | 27.1 MB
Print size: 31.5 × 21.6 cm | 1463.4 × 1003.9 in (300 dpi)