Pure brilliance, shining crystals, pure aesthetics. This specimen is formed by several sphalerite crystals, very, very bright, complex and of intense black color. When the light falls on them, the reflections are amazing. They are accompanied by lenticular siderite that gives a touch of contrast with the sphalerite. Some scattered crystals of arsenopyrite. A piece that will stand out in the showcase; turn it over with your hand hand under the light and enjoy.