This goethite is completely unique among this lot. The goethite crystals are a deep brown to almost black in places, and in places there is an iridescent sheen. Excellent lustre! With magnification, you can see small quartz crystals perched on the goethite crystals. In excellent condition, a bit of rubbing. A beautiful dark goethite.
About These Goethites
Although goethite is a common mineral, it is uncommon to find collection-worthy specimens of crystallized goethite. These goethite specimens were found in one of the huge chamber pegmatites at Volodarsk (which have long been famous for fantastic beryls and huge topaz crystals, to go along with monster quartz crystals). In 2013, the mining workings intersected a pocket which contained these radial sprays of goethite. I acquired them from the person who mined them out before the water table was allowed to submerge the pocket. The detailed locality information for these (included on the label accompanying each specimen) is Pegmatite No. 597, Mine No. 3.