Argentite – Octahedron, Pyrite – Zacatecas, Mexico
 Exceptionally aesthetic argentite specimen with perfect crystal formation in wonderful size.
 The argentite octahedra are all sharp-edged, lustrous, and undamaged. The rare silver sulfide mineral is partially altered to galena at the edges.
 The aesthetically grown argentites stand out beautifully from the calcite matrix and are associated with golden pyrite.
 Argentite specimens are almost impossible to acquire, especially in such good quality, size and aesthetics!
 A true mineralogical and aesthetic highlight for any collection!