Excellent miniature that shows an interesting pseudomorphs of pyrite after pyrrhotite, which perfectly preserves the original hexagonal shape. Brilliant, defined, with good thickness and disposed on a very aerial way on the matrix. Peppered by small but brilliant pyrite crystals and some quartz crystals. The main crystal is: 1,8 x 1,6 x 0,4 cm. From the former collection of François Gaboury.