Locality: Margaritas No. 1 Mine, Sierra Peña Blanca, Peña Blanca District, Aldama Municipality, Chihuahua, Mexico Dimensions: 8 cm x 8 cm x 5.5 cm
Large, very rich specimen of well-crystallized yellow tyuyamunite microcrystals with calcite that fluoresce a cream color under all UV wavelengths from the Margaritas No. 1 Mine, Sierra Peña Blanca, Peña Blanca District, Aldama Municipality, Chihuahua, Mexico. Quite nice for this species at this uncommon locality. Eric Quinter specimen U/Th 0942, pictured on mindat.org. Rare!
