Dims: 2.6" x 2.0" x 1.6" (6.6 x 5.1 x 4.1 cm)
Wt: 5.82 oz. (165.0 g)
Mina Los Belones, La Union, Murcia, Spain
This is one of the stranger and more attractive Pyrolusite specimens that I have come across. It consists of a thin crust of Pyrolusite that covers a crystal formation of barite. There are some semicrystalline formations of the Pyrolusite, though; the upper edges of the two largest barite crystals are lined with tiny "puffs" of round, radiating pyrolusite formations, and several larger ones on lesser crystals. The material is generally colored black, though some appears to have a dark gray color, and all has a very dull luster and is opaque. The barite crystals that the Pyrolusite coats have excellent orthorombic form that is quite easily visible due to the Pyrolusite's dark color and dull luster. The two largest crystals may have started out as one single crystal and then broke apart and were partially healed. Other, smaller crystals sprout off of their sides, which show many small formations and growth patterns. It is one of a few minerals that we stock which were mined in Spain.