Autunite from the Historic Daybreak Mine, Washington, USA
A striking specimen of Autunite from the famous Daybreak Mine near Spokane, Washington, one of the most well-known uranium mineral localities in the United States. This specimen features vibrant canary-yellow crystalline coatings and aggregates beautifully contrasted against a light-colored host matrix.
Autunite is a hydrated calcium uranyl phosphate mineral prized by collectors for its intense color, natural fluorescence under ultraviolet light, and historical significance as an important secondary uranium mineral. The mineral often forms tabular crystals and radiating aggregates in the oxidized zones of uranium deposits.
Mineral: Autunite
Chemical Formula: Ca(UO₂)₂(PO₄)₂·10–12H₂O
Locality: Daybreak Mine, Spokane, Washington, USA
Highlights
-
Bright yellow autunite crystals with excellent visual appeal
-
Classic material from the renowned Daybreak Mine
-
Fluoresces vivid green under longwave UV light
-
Historic American uranium locality
-
Excellent display specimen for uranium mineral collectors
Autunite is one of the most recognizable uranium minerals in the world and remains a favorite among collectors due to its brilliant coloration, fluorescence, and importance in the history of uranium mineralogy.
Note: This specimen contains naturally occurring uranium and should be handled and stored responsibly. Avoid prolonged close contact and wash hands after handling. Displaying in a closed specimen case is recommended
