Ferberite (rare doubly terminated twin) on matrix! Dave Bergman A more than worthwhile matrix

A more than worthwhile matrix Ferberite that would make a great addition to any collection

one can see a sparkling spherical aggregate of Marcasite on the top (or bottom depending upon the angle) of the twin

This attractive specimen features beautiful lustrous

Very little damage

Ferberite (rare doubly terminated twin) on matrix! Dave Bergman A more than worthwhile matrixA VERY rarely seen Ferberite twin on matrix from Tasna. Often, the Ferberites from Tasna are not found on matrix as they are heavy in nature and the brittleness of the species causes it to fall off the host rock in the blast during mining operations. This specimen is not only an impressive, and dramatically aesthetic matrix piece, but the Ferberite twin is DOUBLY TERMINATED, which is only seen in a very small percentage of pieces from Tasna. I