Group of calcite crystals showing well defined edges and faces with rhombohedron and prism forms. Between translucent to transparent and disposed in a matrix of greenish-toned siderite. This specimen comes from col. Daunis. It is labeled as Somorrostro, but we think it can be associated with the mining zone associated to the Bilbao anticline, Gallarta-La Arboleda-Somorrostro. A Spanish classic.

Size: 6.5 x 5.5 x 4.8 cm.
Main crystal: 24 x 22 mm.
Found in 1980's.

Excol. Lluís Daunis & Maria Ruscalleda (Barcelona). Ex. E. Kucera.

These malachite specimens come from works those were carried out in the railroad called "Basque Y". During these works, some rocks containing this mineral were extracted. They show prismatic radial aggregates of deep green malachite with an exceptional brilliance. Crystals are flattened due to its growth in fissures. Some transparency could be observed. Its origin is due to alteration of the original chalcopyrite matrix, present as small but brilliant granules, accompanied by hematite. The fibrous shape, color and luster make them very aesthetic.

Size: 8,7 x 5,0 x 3,6 cm.
Found in 2012.

Groups of very brilliant sphalerite crystals showing complex habitus and twins. With an intense luster and deep brown color, near black, with honey reflections. They are peppered by several small but brilliant chalcopyrite crystals. On a siderite matrix, accompanied by dolomite, galena and defined brilliant chalcopyrite crystals. Nowadays, this mine, in the city of Bilbao, is collapsed and it is impossible to get these classic Spanish specimens.

Size: 8,0 x 6,7 x 4,2 cm.
Main crystal: 12 x 10 mm.
Found in 09/2003.

Nice hemimorphite specimen from a classic Basque mine. Mineral is covering with a crystalline crust the cavities of the carbonated matrix. Color varies between blue, green to colorless.

Size: 6,0 x 5,2 x 3,7 cm.
Found in 2008.