Rosell Minerales

Interesting example of goethite with a richness and very remarkable intense iridescences. From the classic mines of Riotinto; collected in 1985, accompanied by old label.

Size: 9.5 x 7.4 x 3.2 cm.
Found in 1985.

Col. J.M. Manchion (Barcelona). No.162.

Arborescent growth of deformed and flattened native copper crystals. Some of them, smaller ones, still show complex cubic forms. Its color is the original and I preferred not alter it by chemical methods. In some of the branches we can see the brilliance of copper, but the rest has this "coppery" tone. It is disposed very aerial on the rocky matrix.
Nowadays the mine is flooded, so get new specimens is quite complicate, if not impossible. A classic mineral specimen from this “Spanish pyrite belt” locality.

 

 

Size: 6,1 x 5,0 x 2,7 cm.
Main crystal: 4 x 3,7 cm. (agreg.)
Found in 1990-92

Arborescent growth of deformed and flattened native copper crystals. Some of them, smaller ones, still show complex cubic forms. Its color is the original and I preferred not alter it by chemical methods. In some of the branches we can see the brilliance of copper, but the rest has this "coppery" tone. It is disposed very aerial on the rocky matrix.
Nowadays the mine is flooded, so get new specimens is quite complicate, if not impossible. A classic mineral specimen from this “Spanish pyrite belt” locality.

Size: 4,0 x 3,2 x 1,4 cm.
Found in 1990-92

Precio reducido-Reduced price 65€

Laminar growth of deformed and flattened native copper crystals. Its color is the original and I preferred not alter it by chemical methods. In some of the branches we can see the brilliance of copper, but the rest has this "coppery" tone. It is disposed very aerial on the rocky matrix.
Nowadays the mine is flooded, so get new specimens is quite complicate, if not impossible. A classic mineral specimen from this “Spanish pyrite belt” locality.

Size: 6,6 x 3,3 x 2,0 cm.
Found in 1990-92

Arborescent growth of deformed and flattened native copper crystals. Some of them, smaller ones, still show complex cubic forms. Its color is the original and I preferred not alter it by chemical methods. In some of the branches we can see the brilliance of copper, but the rest has this "coppery" tone. It is disposed very aerial on the rocky matrix.
Nowadays the mine is flooded, so get new specimens is quite complicate, if not impossible. A classic mineral specimen from this “Spanish pyrite belt” locality.

Size: 4,9 x 3,7 x 2,3 cm.
Found in 1990-92

Arborescent growth of deformed and flattened native copper crystals. Some of them, smaller ones, still show complex cubic forms. Its color is the original and I preferred not alter it by chemical methods. In some of the branches we can see the brilliance of copper, but the rest has this "coppery" tone. It is disposed very aerial on the rocky matrix.
Nowadays the mine is flooded, so get new specimens is quite complicate, if not impossible. A classic mineral specimen from this “Spanish pyrite belt” locality.

Size: 4,5 x 3,2 x 1,8 cm.
Found in 1990-92

A huge size native copper specimen showing an arborescent growth of deformed crystals. Some of them still show complex cubic forms. Its color is the original and I preferred not alter it by chemical methods. In some of the branches we can see the brilliance of copper, but the rest has this "coppery" tone.
Nowadays the mine is flooded, so get new specimens is quite complicate, if not impossible. A classic mineral specimen from this “Spanish pyrite belt” locality.

Size: 10,0 x 6,7 x 3,0 cm.
Found in 1990-92

Precio reducido-Reduced price 240€

Group of very sharp cerussite crystals showing a reticulated growth, like a star or a snowflake, with good brilliance. Very aerial disposed. These specimens belong to a chance finding that yielded a few specimens of this quality. From the well-known mining area of Tharsis.

Size: 2,7 x 2,0 x 1,6 cm.
Found in 09/2011

Group of very sharp cerussite crystals showing a reticulated growth, like a star or a snowflake, with good brilliance. Very aerial disposed. These specimens belong to a chance finding that yielded a few specimens of this quality. From the well-known mining area of Tharsis.

Size: 2,0 x 1,8 x 1,7 cm.
Found in 09/2011

Group of very sharp cerussite crystals showing a reticulated growth, like a star or a snowflake, with good brilliance. Very aerial disposed on a stalactite goethite. These specimens belong to a chance finding that yielded a few specimens of this quality. From the well-known mining area of Tharsis.

Size: 3,1 x 2,6 x 2,0 cm
Found in 09/2011

Very aesthetic stalactic-botryoidal formation of goethite, with some iridescence. This specimen does not show those colors seen in the samples of this locality since it has not been manually husked. It is presented in the original shape with which it appears in the deposit, nowadays very difficult to find.

Size: 8.3 x 4.5 x 3.0 cm.
Found in 2011.

Druse of small torbernite crystals forming rossetes of tabular crystals with a green color.

Size: 4.3 x 3.0 x 2.7 cm.
Main crystal: 1 x 1 mm.

Globular aggregates of prehnite with a delicate light green color. With well defined and very bright crystal terminal faces. We can observe the radial growth on a sectioned aggregate. These brilliant specimens are quite unusual in this closed quarry.

Size: 8.3 x 6.2 x 3.5 cm.

An aesthetic globular aggregate of prehnite, disposed very aerially on a matrix covered by several needles of actinolite. Translucent, with a green color with yellowish tones. From a classic Spanish locality.

Size: 7.7 x 6.5 x 5.3 cm.
Main crystal: 27 x 23 mm. aggreg.

Rich group of galena crystals those show facets of the cube, octahedron and dodecahedron in the edges. Very bright and interpenetrated, with a good size. They are accompanied by small crystals of quartz and pyrite. Specimens from these classic mines are difficult to see today. These mines are located in the mining area of La Carolina; the village of El Guindo is located about 8 kilometers from La Carolina, on the road to the also mining town of El Centenillo. The town is located next to the mine shafts of El Guindo and La Manzana, which constituted two of the most important works in the area.

Size: 9.5 x 8.0 x 4.7 cm.
Main crystal: 25 x 25 mm.

Col. Jordi Povill (Olesa de M.) No. 2096
Classic locality

Into a galena matrix vug we can see some anglesite crystals well defined, with brilliance and richly faceted. They show a good transparence and striated faces. They are accompanied by galena crystals those have grown on faces other small crystals of the same species. A sample from a great classic Spanish locality.

Size: 6,0 x 4,7 x 4,0 cm.
Main crystal: 7 x 5 mm.

A rich group of scalenohedral calcite crystals, very acute, translucent, of good size and from this classic Andalusian locality. Not very common in these mines. Under the ultraviolet (LW) light they present a very remarkable red-pink fluorescence.

Size: 6.6 x 4.2 x 3.5 cm.
Main crystal: 25 x 12 mm.
Found in 1975.

Col. J.M. Manchion (Barcelona) - No.283 (Sabadell)
Fluorescent under long wave UV

Group of blue quartz crystals, bright, some of them forming complex groups and other ones isolated, doubly terminated. They show short prisms along with developed terminal rhombohedral faces. Intense blue gray color due to amphibole inclusions. The matrix is partially covered with magnesium-riebeckite fibers. Very aesthetic specimen.

Size: 10.5 x 8.0 x 2.5 cm.

A very rich group of goethitized pyrite crystals, covered by a thin layer of limonite, from this classic Spanish locality. Defined crystals and orange color. Good size specimen.

Size: 14.0 x 11.0 x 4.2 cm.
Main crystal: 22 x 20 mm.
Found in 2005.

Although our country is rich in different forms of calcite, we want to emphasize on this specimen that shows two generations of crystal growth. The first generation calcite clusters have a good size and orange to yellowish pastel tones. With an elongated striated prism and rhombohedral terminal top forms. They are translucent and brilliant, with echeloned growths on faces.
A second generation of small, but transparent and brilliant calcite crystals, is disposed near to perpendicular on the prism of the first generation. A colored and strongly fluorescent calcite from la Cala.

Size: 7,5 x 5,5 x 3,8 cm.
Main crystal: 2,5 x 1,1 cm.

Fluorescent under long wave UV

The label of this specimen reads "Sevilla". In the catalog of the Manchion collection it is mentioned that this piece of schorl-dravite was acquired to Dr. Joan Viñals, at the Granollers fair in 1988. For that reason, in the absence of more info, we will leave this wonderful Andalusian region as its origin. M. Calvo talks about tourmalines in pegmatites from the Los Ángeles mine, near El Castillo de las Guardas, in Seville.

Size: 4.5 x 3.8 x 3.6 cm.
Found in ±1988.

Col. J.M. Manchion (Barcelona). No. 399. J. Viñals, 1988.

Gray djurleite well defined crystals (largest group 9 mm) interpenetrated, showing octahedral forms, with triangular faces. On a matrix of copper sulphides. As usual of these specimens, they may actually correspond to phases of djurleite-chalcocite. We can consider the specimens of Las Cruces mine among the best worldwide. From the former Povill collection.

Size: 8.8 x 6.8 x 4.3 cm.
Main crystal: 9 mm. 20 x 18 mm aggr.

Excol. J. Povill (Olesa de Montserrat, Barcelona)

In this specimen, we observed some sulfide aggregates very characteristic of Las Cruces mine. They were partially covered with calcite and under it appear groups of very brilliant chalcocite crystals. But the most interesting part of this specimen are the small, very brilliant crystals those cover sulphides. It is an unusual species: Luzonite. Luzonite is a rare copper sulfoarsenide. I have made the relevant analysis that yields consistent results: S 35.19%, Cu 41.82%, As 22.99% (%wt). You can find more information at espiadellabo.com.

Size: 8 x 6.5 x 4.7 cm.

Analyzed specimen with report

Group of rhombohedral calcite crystals with a complex combination showing defined faces and rounded edges. Translucent and very curious waxy luster. On them various prehnite globular aggregates formed by radial growths. A very unusual mineralogical curiosity.

Size: 6.0 x 5.2 x 3.7 cm.
Found in 2014.

Fluorescent under long wave UV

Brilliant fribrous aerinite aggregates, with a blue color with greenish tones. Usually aerinite from this classic locality is layering fissures in the dolerite rocky matrix. In this sample, the development of the fibers and its luster make it an excellent representative for the species. From a classic Spanish locality.

Size: 7,4 x 5,4 x 2,5 cm.
Main crystal: 10 mm (fribr.).