Coffinite & Volborthite - Shinarump Conglomerate, Navajo County, Arizona, USA

U(SiO₄) · nH₂O        Cu₃(V₂O₇)(OH)₂ · 2H₂O

A great sample of Coffinite & Volborthite from the Shinarump Conglomerate, Navajo County, Arizona, USA. This specimen also contains minor Carnotite.

Approx. specimen size: 50mm x 40mm x 32mm

Approx. specimen activity on an SE International Ranger EXP: 3000 cpm