Smoky quartz crystals in parallel growth. Translucent, with a uniform smoky tone, they alternate glossy and matt faces. The quartz crystals from this quarry are a classic of Catalan mineralogy. Currently works are abandoned and it is difficult to find new specimens.

Size: 7.4 x 4 x 3.8 cm.
Found in 04/2001.

Smoky quartz crystal on a microcline matrix. Translucent, with a uniform smoky tone, it alternates brilliant and matte faces. The quartz crystals from this quarry are a classic of Catalan mineralogy. Currently works are abandoned and it is difficult to find new specimens.

Size: 5.1 x 3.1 x 2.8 cm.

Microcline crystals in parallel growth. They show faces of the Baveno twin. The microcline crystals from this quarry are a classic of Catalan mineralogy. Currently works are abandoned and it is difficult to find new specimens.

Size: 5 x 2.6 x 2.4 cm.
Found in ±2004.

Microcline crystal with muscovite inclusions. It presents faces of the Baveno twin. The microcline crystals from this quarry are a classic of Catalan mineralogy. Currently works are abandoned and it is difficult to find new specimens.

Size: 4.5 x 4.3 x 3.2 cm.
Found in ±2004.

Microcline crystal with muscovite inclusions. It presents faces of the Baveno twin. The microcline crystals from this quarry are a classic of Catalan mineralogy. Currently works are abandoned and it is difficult to find new specimens.

Size: 4.7 x 4 x 2.8 cm.
Found in ±2003.

Smoky quartz crystals with parallel growths. Smoky tone is good. The quartz crystals from this quarry are a classic of Catalan mineralogy. Currently quarry is abandoned and it is difficult to find new specimens.

Size: 6.6 x 4.2 x 2.9 cm.
Found in 04/2001.

Rich specimen formed by numerous isolated fluellite crystals and forming groups, with a pink to violet color, an unusual fact since fluellite is usually colorless. It is accompanied by whitish to slightly greenish growths of metavariscite. Under magnification we can observe globules of this last phosphate. These specimens are a classic of mining in Navarra and are currently only available through old collections.

Size: 5.8 x 5.4 x 4.8 cm.
Main crystal: 1 mm.
Found in ±2006.

These specimens from the La Viesca mine are very rare and appeared in the middle of the last decade. It is a very bright specimen formed mainly by cubic fluorite crystals with polysynthetic growths on the faces and asymmetrically beveled edges, transparent and colorless. They are accompanied by bright and well-defined chalcopyrite crystals, along with complex and transparent honey-colored crystals of sphalerite. With galena and quartz. Highly prized for their rarity.

Size: 10 x 4.5 x 4.2 cm.
Main crystal: 5 mm.
Found in ±05/2012.

Specimen formed by numerous globular aggregates of talc, silky and slightly yellowish, which are accompanied by honey-colored dolomite crystals. A very aesthetic and old specimen for this mine from León.

Size: 7.3 x 6.2 x 1.5 cm.
Found in 15/10/2000.

Group of magnetite crystals with octahedral shapes and polysynthetic growths on the faces, good luster and size. With pyrite crystals on the backside of the specimen. It belongs from the Lluis Manchion collection with a handwritten label.

Size: 6.5 x 6.5 x 5.2 cm.
Main crystal: 1.2 cm.
Found in ±1984.

Ex col. Manchion (Barcelona).

Druse of cubic fluorite crystals, with the edges beveled by the dodecahedron, transparent to translucent, with a violet to bluish color depending on the type of light. Presents some exfoliation without affecting aesthetics. With quartz and some inclusions of chalcopyrite.

Size: 7 x 6.2 x 4.5 cm.

Floater crystals of smoky quartz with parallel growths. The quartz crystals from this quarry are a classic of Spanish mineralogy. Currently the quarries are abandoned and it is difficult to find new specimens.

Size: 5.8 x 3.3 x 2.4 cm.
Found in ±2004.

In a building works in Cal Gairal street, in the Rocabruna village (Bruguers, Gavà), a few specimens of intense green variscite were found forming veins in grey slates. Unfortunately when we were able to access these works, the exact place where these specimens were extracted from had already been filled and covered with concrete. Variscite had not been found in the Bruguers area for many decades, let alone with this quality. X-ray diffraction results indicated the presence of crandallite. We recommend the recently published book: "Mines i minerals de la serra de les Ferreres. Les mines de Rocabruna, Bruguers, Gavà" (Catalan language).

Size: 7.8 x 6.5 x 5.7 cm.
Main crystal: 7.5 mm. veta/vein.
Found in 18/05/2022.

Analyzed specimen with report

In a building works in Cal Gairal street, in the Rocabruna village (Bruguers, Gavà), a few specimens of intense green variscite were found forming veins in grey slates. Unfortunately when we were able to access these works, the exact place where these specimens were extracted from had already been filled and covered with concrete. Variscite had not been found in the Bruguers area for many decades, let alone with this quality. X-ray diffraction results indicated the presence of crandallite. We recommend the recently published book: "Mines i minerals de la serra de les Ferreres. Les mines de Rocabruna, Bruguers, Gavà" (Catalan language).

Size: 7.8 x 6.7 x 5 cm.
Main crystal: 6 mm. veta/vein.
Found in 18/05/2022.

Analyzed specimen with report

Aesthetic specimen that combines an upper part formd by goethite botryoidal aggregates, with a semi-matt luster, and a lower part with stalactitic growths of manganese oxides. They are accompanied by hematite of intense red color and baryte. A very interesting specimen from "la Sierra de la Unión".

Size: 7.3 x 7 x 4.2 cm.

Excol. Juan M. Casanova

Group of very well defined fluorite crystals, between transparent and translucent, and with a yellowish-green color characteristic of this mine. Some have color zoning. They are accompanied by small crystals and hyaline quartz. These specimens that we offer were collected in the early 70s.

Size: 11 x 5.5 x 3.4 cm.
Main crystal: 1.6 x 1.4 cm.
Found in ±1970.

Fluorescent under long wave UV

In this specimen we can observe several almandine garnet crystals included in a matrix with violet-blue cordierite crystals, the pleochroism of which can be observed on the edges. The specimen belonged to the Peter Seroka collection.

Size: 6 x 5.7 x 4.7 cm.

Col. P. Seroka #601
It shows Pleochroism

Group of diopside crystals with an intense green color, parallel growths, brilliant and translucent. A specimen of this classic Spanish locality from the Peter Seroka collection.

Col. Peter Seroka, #430 (Girona).

Very good size specimen of celestine from this classic Spanish locality. In this specimen we can observe various botryoidal to stalactitic forms, one of them in the form of a bridge-curl, and which cover old celestine crystals, as evidenced by the rounded prismatic shapes.

Size: 14.2 x 12 x 5.7 cm.
Found in ±2006.

Specimens of bavenite from Cadalso de los Vidrios are a classic of Spanish mineralogy and pieces of this beryllium and calcium aluminosilicate had not been seen for quite some time. In this good-sized specimen formed by parallel growths of microcline crystals with albite, we can observe numerous rosette-shaped aggregates of tabular bavenite crystals, well defined, brilliant, and colorless to slightly yellowish. The specimen belongs to a North American collection.

Size: 12.1 x 9 x 5.8 cm.

Col. Erich Laskowski.
Classic locality

Scolecite and aerinite specimens from this Aragonese area are known worldwide. This specimen shows us groups of acicular crystals forming radiated aggregates in the dolerite and that, when extracted, allow us to see their internal arrangement perfectly. White in color, with iron oxydes patina, and good brilliance. Samples of this quality and size are not common and even less so today.

Size: 9.6 x 7.4 x 4.5 cm.
Main crystal: 17 mm. aggreg.

Classic locality

Laminar crystals of kyanite, with a bluish tone, from this deposit located on the road between Canillas del Aceituno and Sedella. This specimen belongs from the Peter Seroka collection and is accompanied by the label.

Size: 7 x 6.6 x 3.7 cm.
Main crystal: 42 mm.
Found in ±1998.

Col. Peter Seroka (#222).

Druse of jarosite crystals, very bright and with a characteristic brown color. From a mine little represented in collections.

Size: 5.5 x 5.3 x 2.3 cm.

Col. Peter Seroka (#591).

Kyanite specimens from this border area between the towns of Montejo de la Sierra (Madrid) and El Cardoso de la Sierra (Guadalajara) have been the subject of discussion for a long time. In the area there are different deposits from which they can belong. In this specimen, the Baltasar Sánchez label is preserved, indicating the specimen from El Zahurdón, in Montejo de la Sierra. In the area we have toponyms such as Corrales de Zahurdón. Peter Seroka, to whom this piece belonged, indicates already in 1973 the presence of kyanite about 1000 m from the milestone of Km 3 of the road from Montejo to El Cardoso (Miguel Calvo's Mines and Minerals of Spain), see discussion in this link.
This specimen shows a group of kyanite crystals on a matrix with quartz, with an intense color. It is accompanied by the two mentioned labels. Very interesting...

Size: 6.7 x 4.5 x 2.2 cm.
Main crystal: 39 mm.

Col. Baltasar Sánchez; Col. Peter Seroka (#604).

Beryl crystal from this classic Spanish locality, very good sized, well defined faces and with muscovite at the base. Translucent in the edges. The specimen belongs from the Peter Seroka collection and due to its number label it can be placed in the 1980s. These pieces are difficult to see today.

Size: 8 x 7 x 5.9 cm.
Found in ±1980.

Col. Peter Seroka (#482).
Classic locality