Columbite-(Fe) - Petaca Mining District, New Mexico, USA (Analyzed)

Fe²⁺Nb₂O₆

Here is one for you rare-earth collectors out there. A nice specimen of Columbite-(Fe) from the  Petaca Mining District, Rio Arriba County, New Mexico, USA. This specimen has been collected and analyzed by Charles Young, and includes a copy of the XRF report.

Approx. specimen size: 40mm x 25mm x 25mm

Approx. specimen activity: 2700 cpm