Tyuyamunite, Calcite, Opal-A (Var: Opal-AN): Animas Mine, Francisco Portillo, West Camp, Santa Eulalia Mining District, Aquiles Serdán Municipality, Chihuahua, Mexico

Species: Tyuyamunite, Calcite, Opal-A (Var: Opal-AN)

Locality: Animas Mine, Francisco Portillo, West Camp, Santa Eulalia Mining District, Aquiles Serdán Municipality, Chihuahua, Mexico
Dimensions: 8.5 cm x 5.5 cm x 5.5 cm

Rich, colorful specimen of abundant yellow tyuyamunite microcrystals mixed with drusy aggregates of uraniferous calcite that fluoresce a green under all UV wavelengths overlying opal-AN that also fluoresces green from the Animas Mine, Francisco Portillo, West Camp, Santa Eulalia Mining District, Aquiles Serdán Municipality, Chihuahua, Mexico. Eric Quinter specimen U/Th 0983, pictured on mindat.org. Unusual!