This half size flat features Metamunirite and Zippeite Crystals from the classic D-Day Mine in Utah, USA. The Crystals occur as yellow to yellow-green coatings and crusty aggregates on light to grey matrix, which is characteristic for this locality. Under UV light, the specimens show a clear reaction, making the mineralogical composition especially easy to observe. The flat combines a varied selection of specimens with clearly recognizable Crystal areas and a typical distribution of colors. The illustrated half size flat shows exactly the offered collection.
Geology & Origin
The D-Day Mine is located in the well-known uranium district of Utah and is famous for secondary uranium minerals such as Metamunirite and Zippeite. These minerals form as weathering and oxidation products of primary uranium ores in arid to semi-arid environments. Their formation involves uranium-bearing solutions reacting with phosphates, sulfates, and carbonates. The locality is considered a classic source for fluorescent uranium minerals and is highly regarded by collectors and mineralogists worldwide.