GR37AM2: Botryoidal Goethite growths with very fine surfaces, very shiny and dense black in color. The specimen, from one of the great classical Spanish iron ore deposits, comes from the Pedro Goy collection, whose very detailed catalogue entry will be sent to the buyer.
La Arboleda Mines, La Arboleda (Zugaztieta), Valle de Trápaga/Trapagaran, Comarca Gran Bilbao, Vizcaya / Bizkaia, Basque Country (Euskadi)  Spain

Specimen size: 12 × 10.4 × 6.3 cm = 4.72” × 4.09” × 2.48”