Rosell Minerales

Group of tourmaline schorl crystals in parallel growth, with an intense black color and brilliance. With defined top terminal faces. It belongs from the collection of Peter Seroka (L'Escala, Catalonia).

Size: 6.3 x 4.2 x 2.8 cm.

Col. Peter Seroka (L'Escala, Girona) #599

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.

Very interesting specimen from this old Roman mine located between Cármenes and Villamanín (León, Spain), which was later exploited for copper until the end of the 20th century. These are botryodal aggregates of chrysocolla replacing tyrolite. A rarity of this Leonese mine.

Size: 7.6 x 7.3 x 5.4 cm.
Found in ±1998.

Col. M. Marí - A. García (Castelló)
Classic locality

Pyrolusite specimens from Sagides (Soria) are rare on the market. In this specimen we can see bright aggregates of fine prismatic pyrolusite crystals. They are partially covering a goethite matrix.

Size: 5.5 x 4 x 2.5 cm.
Found in ± 1975.

Col. Joan Astor (Barcelona).

Various complex cinnabar crystals, some with a cyclic twin, one of them clearly dominant. Excellent luster and intense red color, stand out on the quartz matrix from which the calcite has been removed. This mine was worked until the early 1970s. A Spanish classic that is not easy to find in the market.

Size: 6.6 x 3.2 x 1.8 cm.
Main crystal: 6 mm.

Group of fan-shaped prismatic epidote crystals, brilliant and with an intense green color. These specimens come from a not well-known quarry, close to Medina de Pomar, in Burgos, from a quarry where the ofites have been mined by the company Minera Ofitas del Norte.

Size: 8.5 x 4.4 x 3.8 cm.
Main crystal: 1 cm.

Rich group of fan-shaped prismatic epidote crystals, brilliant and with an intense green color. These specimens come from a not well-known quarry, close to Medina de Pomar, in Burgos, from a quarry where the ofites have been mined by the company Minera Ofitas del Norte.

Size: 9.1 x 7.5 x 3.2 cm.
Main crystal: 1.2 cm.

Rich group of fan-shaped prismatic epidote crystals, brilliant and with an intense green color. These specimens come from a not well-known quarry, close to Medina de Pomar, in Burgos, from a quarry where the ofites have been mined by the company Minera Ofitas del Norte.

Size: 6.2 x 4.8 x 1.8 cm.
Main crystal: 1.1 cm.

This Leonese mine is near the Riaño reservoir. In this specimen we can see various radial aggregates of acicular prismatic stibnite crystals, with an intense luster and disposed in a calcite matrix that include them. In 1909 Spanish Mining Statistics, indicates the demarcation of 22 properties in this area with the name of "María Teresa" mine (document Nr. 3,260), of antimony, in the name of Policarpo Herrero, domiciled in Oviedo (FMF). A very fine and representative specimen.

Size: 6.3 x 6.2 x 2.4 cm.
Main crystal: 1.8 cm.
Found in 2019

Druse of small quartz crystals, some doubly terminated, partially covered by white kaolinite. Peppered by several anatase crystals, with dipyramidal faces, truncated by basal pinacoid. Very sharp, translucent and with a toasted honey tone. Very aesthetic and rare in the market.
It is interesting to say that recent analysis of the reddish ashlars of the Torre Nueva (New Tower) of the Astorga cathedral indicated that these building materials were extracted from this Cantera del Moro during XVIIth and XVIIIth centuries.

Size: 10 x 9 x 4 cm.
Main crystal: 1.5 mm.

Druse of small quartz crystals, some doubly terminated, partially covered by white kaolinite. Peppered by several anatase crystals, with dipyramidal faces, truncated by basal pinacoid. Very sharp, translucent and with a toasted honey tone. Very aesthetic and rare in the market.
It is interesting to say that recent analysis of the reddish ashlars of the Torre Nueva (New Tower) of the Astorga cathedral indicated that these building materials were extracted from this Cantera del Moro during XVIIth and XVIIIth centuries.

Size: 6 × 4.5 × 3.7 cm
Main crystal: 2 mm

Rich group of small hexagonal prismatic pyromorphite crystals with an intense green color partially covering a quartz matrix. Crystals are very sharp and color very uniform. From a Spanish locality not well represented in collections.

Size: 4.8 x 4.5 x 4.0 cm.

Col. Jordi Povill
Classic locality

Specimen formed by a large group of aggregated nodules of variscite with concentric growths and apple green color. They are enclosed in a matrix with limonite. We can see the concentric structures in the natural fracture. Since its discovery in 1970, the Palazuelo de las Cuevas deposit became the "source" of variscite for the NW of the Iberian peninsula.

Size: 5.5 x 5.5 x 5.3 cm.
Found in ±1980's

Specimen formed by a large group of aggregated nodules of variscite with concentric growths and apple green color. They are enclosed in a matrix with limonite. We can see the concentric structures in the natural fracture. Since its discovery in 1970, the Palazuelo de las Cuevas deposit became the "source" of variscite for the NW of the Iberian peninsula.

 

Size: 5.3 x 4.2 x 1.8 cm.
Found in ±1980's

Specimen formed by a large group of aggregated nodules of variscite with concentric growths and apple green color. They are enclosed in a matrix with limonite. We can see the concentric structures in the natural fracture. Since its discovery in 1970, the Palazuelo de las Cuevas deposit became the "source" of variscite for the NW of the Iberian peninsula.

Size: 4.5 x 3.8 x 3.3 cm.
Found in ±1980's

These gold nuggets were collected from the alluvial deposits of the quaternary paleoterraces of the Tormes river, pass through the locality of Salvatierra de Tormes. The analysis carried out have shown the presence of silver. Some specimens contain fragments of quartz. Thin, good size and brilliant. Weight: 0.20 g.

Size: 1.0 x 0.6 x 0.1 cm.
Found in 2018.

These gold nuggets were collected from the alluvial deposits of the quaternary paleoterraces of the Tormes river, pass through the locality of Salvatierra de Tormes. The analysis carried out have shown the presence of silver. Some specimens contain fragments of quartz. Thick, good size and brilliant. Weight: 0.97g.

Size: 1.0 x 0.8 x 0.3 cm.
Found in 2018.

These gold nuggets were collected from the alluvial deposits of the quaternary paleoterraces of the Tormes river, pass through the locality of Salvatierra de Tormes. The analysis carried out have shown the presence of silver. Some specimens contain fragments of quartz. Thin, good size and brilliant. Weight: 1.34 g.

Size: 1.6 x 1.5 x 0.1 cm.
Found in 2018.

These specimens were collected in an outcrop situated between the villages of Malpartida de Corneja and Casillas de Chicapierna, in Ávila. They are floating crystals of twinnen orthoclase (Karlsbad) those have been partially or totally pseudomorphized by quartz. They present visible forms of the twin, with altered faces with curious cavities. Some specimens still preserve an orthoclase crystal core. This pseudomorphosis is very unusual.

Size: 4.6 x 3.6 x 2.0 cm.
Found in ±1990

These specimens were collected in an outcrop situated between the villages of Malpartida de Corneja and Casillas de Chicapierna, in Ávila. They are floating crystals of twinnen orthoclase (Karlsbad) those have been partially or totally pseudomorphized by quartz. They present visible forms of the twin, with altered faces with curious cavities. Some specimens still preserve an orthoclase crystal core. This pseudomorphosis is very unusual.

Size: 3.8 x 3.6 x 1.8 cm.
Found in ±1990

These specimens were collected in an outcrop situated between the villages of Malpartida de Corneja and Casillas de Chicapierna, in Ávila. They are floating crystals of twinnen orthoclase (Karlsbad) those have been partially or totally pseudomorphized by quartz. They present visible forms of the twin, with altered faces with curious cavities. Some specimens still preserve an orthoclase crystal core. This pseudomorphosis is very unusual.

Size: 4.6 x 4.1 x 2.2 cm.
Found in ±1990

Among the Spanish collectors, the Zamoran opals are well known. This specimen were collected from an area from which to obtain pieces with this quality and size is very difficult, I can certify it... This specimen presents opal nodules, with an intense orange color, some brilliance and surrounded by a solid matrix. I say this because, despite the visible fractures, stability is assured. A sample of quality for this locality.

Size: 7.5 x 4.5 x 2.5 cm.
Found in 10/2014.

Among the Spanish collectors, the Zamoran opals are well known. This specimen were collected from an area from which to obtain pieces with this quality and size is very difficult, I can certify it... This specimen presents opal nodules, with an intense orange color, some brilliance and surrounded by a solid matrix. I say this because, despite the visible fractures, stability is assured. A sample of quality for this locality.

Size: 7.4 x 5.7 x 3.0 cm.
Found in 10/2014.

Very rich druse of hyaline quartz crystals from a not very-known Spanish locality. Brilliant short prisms, with rich parallel growth, and nice terminal faces. With well defined faces and edges. From its quarries various rock typologies are extracted, the main and the most abundant is the granite characterized by its high hardness and quality, which was honored with a denomination itself, Grey Villa Granite.

Size: 12.0 x 8.5 x 6.9 cm.
Main crystal: 25 x 20 mm.
Found in ca. 2010.

In this specimen we can see some matrix cavities covered by botryoidal aggregates formed by wavellite crystals. Different layers of wavellite are observed. Its color is greenish yellow and more bluish in some areas by the presence of turquoise. They are partially covered by several small aggregates of lanceolate turquoise crystals (see photo) with a light blue color.

These wavellite and turquoise specimens have been analyzed by microprobe and we will send the results to the purchaser, with the SEM photograph of both species. Palazuelo de las Cuevas area is known worldwide for variscite, that were worked for making beads in the Neolithic period, it was 5.000 years ago.

Size: 6,5 x 5,6 x 5,0 cm.
Found in 03/2013.