This Specimen has been sold.
3.4" Metallic, Needle-Like Pyrolusite Cystals - Morocco
This is a lustrous cluster of radiating silver pyrolusite from Morocco. The specimen features several radiating sprays of these shiny, metallic crystals on a red-brown matrix.
Pyrolusite is a mineral consisting of manganese dioxide (MnO2) and is important as an ore of manganese. It has a silver, metallic luster, a black or bluish-black streak, and readily soils the fingers. It commonly is found in finely packed fibrous, acicular and radial forms composed of very fine needles or fibers.