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A very good quality
antimony sulfosalt
Certainly a unique and worthwhile specimen for a collector of Bolivian minerals or rare phosphates
one can see a sparkling spherical aggregate of Marcasite on the top (or bottom depending upon the angle) of the twin
Specimen # BOL711B168
Ferberite (rare doubly terminated twin) on matrix! Dave Bergman A very good qualityA 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
US$ 62.15
US$ 55.50
US$ 122.03
US$ 120.45
