Autunite - Marshall Pass Mining District, Colorado, USA

Ca(UO₂)₂(PO₄)₂ · 10-12H₂O

A nice display specimen of fluorescent Autunite from the Marshall Pass Mining District, Colorado, USA. This specimen is a little crumbly, so it is recommended to keep it in a sealed bag or container.

Approx. specimen size: 85mm x 55mm x 25 mm

Approx. specimen activity on an SE International Ranger EXP: 50 000 cpm