Rosell Minerales

Aesthetic stalactitic aggregates of malachite, with brilliance and uniform green color. Very aesthetic.

Size: 12 x 11 x 8.5 cm.

Malachite specimens from this Upper Katanga mine are notable for radial aggregates of fine crystals that, taken together, have a velvety appearance and excellent brilliance. Intense green colour, good size and fine aesthetics.

Size: 11 x 8.7 x 3.3 cm.

Malachite specimens from this Upper Katanga mine are notable for radial aggregates of fine crystals that, taken together, have a velvety appearance and excellent brilliance. Intense green colour, good size and fine aesthetics.

 

Size: 10.4 x 8.2 x 5 cm.

Malachite specimens from this Upper Katanga mine are notable for radial aggregates of fine crystals that, taken together, have a velvety appearance and excellent brilliance. Intense green colour, good size and fine aesthetics.

Size: 7.9 x 7.6 x 3.8 cm.

Malachite specimens from this Upper Katanga mine are notable for radial aggregates of fine crystals that, taken together, have a velvety appearance and excellent brilliance. Intense green colour, good size and fine aesthetics.

Size: 9.1 x 8.6 x 4.2 cm.

Agatized coral with marked bands. In a very visible coral matrix. Filled inside with botryoidal and banded chalcedony. The sparkly, translucent botryoids and banding have a pleasing variety of honey-brown and creamy colors. Very aesthetic and unusual in the marked. Fluoresces in a light-blue color under a long wave fluorescent light. From Joan Astor (Barcelona) collection.

Size: 6.4 x 6.3 x 2.3 cm.
Found in ±1988.

Fluorescent under long wave UV

This specimen from Mali shows us three doubly terminated epidote crystals, with well defined faces and edges and an intense green color. It is accompanied by sheaf aggregates of stilbite, a presentation different from the usual one for the deposit. Very aerial and aesthetic.

Size: 7.5 x 4.4 x 3.5 cm.
Main crystal: 4.8 x 1.5 cm.

Grube Clara baryte specimens are a classic for the species in Europe. In this specimen we can enjoy numerous crystal aggregates, some isolated, presenting a rich complexity of facets. They are mainly formed by faces of orthorhombic prisms and curiously some are translucent while others are totally transparent. The brilliance, transparence and contrast on the matrix add aesthetics to this specimen.

Size: 7 x 4.4 x 2.5 cm.
Main crystal: 7 mm.
Found in ±2020.

Classic locality

An old-time pseudomorph from the St. Austell District of Cornwall. A very sharp, doubly terminated, Carlsbad-twinned orthoclase crystal has been pseudomorphed by kaolinite. Great old classic material from Cornwall. The piece, adquired to Bailey, is from the collection of Joan Astor and comes with his label.

Size: 6.2 x 3.3 x 1.5 cm.
Found in ±1980.

Col. Joan Astor (Barcelona).

These specimens from this Czech locality were initially cataloged as "hornblende", later studies indicated that it could be kaersutite, a member of the amphibole group. This specimen has a brownish tone that makes us think it could be a pseudomorphosis. It shows very well defined faces that can allow crystallography lovers to measure angles. An old sample.

Size: 3.3 x 2.3 x 1.8 cm.

Classic locality

Wulfenite specimens like the one we present are very unusual for this locality and appeared many years ago. On a matrix with dolomite, galena and baryte there are numerous crystals of intense orange color, with dipyramid faces truncated by the pinacoids. Some appear as isolated crystals and mostly in parallel growth. This specimen is from the Peter Seroka collection and previously belonged to the Marcus Lueg collection.

Size: 7.9 x 7.2 x 4.8 cm.
Main crystal: 1.1 cm.
Found in ±2008.

Col. M. Lueg (2008); Col. P. Seroka (#22)
Classic locality

Various groups of octahedral spinel crystals, very well defined, brilliant and with an intense black color. They are disposed on a matrix of volcanic rock with forsterite. This is a very representative specimen for the species and for this classic Italian locality. It belongs from various collections. Good size and quality for the species.

Size: 6.8 x 5.5 x 4 cm.
Main crystal: 3 mm.

Excol. Panunzi (Itàlia); Excol. Imma Punzo; Col. E. Laskowski (USA)
Classic locality

Very remarkable specimen formed by several aggregates of pericline crystals, a variety of albite, well faceted, defined and with striated faces. It is worth highlighting numerous very brilliant ilmenite crystals in this specimen, with well-defined hexagonal shape. Ilmenite is an unusual species in this locality in the words of the owner of the original collection, Rudolf Hasler (Bleiberg-Kreuth). They are accompanied by groups of clinochlore and quartz crystals. It belongs from the collection of Peter Seroka (Girona), with label.

Size: 10.1 x 9 x 6.6 cm.
Main crystal: 1.9 cm.
Found in ±2011.

Col. R. Hasler; Col. P. Seroka (#694, 2013)

Fehrite is a recent new species found in Almeria (Spain). Some years ago (2012) we identified this species in the Les Ferreres mine (Camprodon) but unfortunatelly we didn't have enough sample to finish detrmination and structural studies. Recently we found some more samples and the characterization was carried out based on the results obtained from the application of various analytical techniques: SEM-EDS, Raman and X-ray diffraction. Les Ferreres mine is the second locality worldwide for the species. We will send all reports to the buyer.
In this Catalan mine, fehrite appears as elongated elongated tabular to fibrous crystals, with a delicate bluish-green tone, and fibrous terminations. Usually, it is accompanied by devilline (blue) and brochantite (green). It is the magnesium analogue of ktenasite.

Size: 2.3 x 1.1 x 1 cm.
Found in ±2019.

Analyzed specimen with report

These specimens are a classic from Las Herrerías mine, and they appeared many years ago. In this piece we can observe a cavity in the rock partially filled with silver foliaceous aggregates, kongsbergite variety, very brilliant and with a silver color with bronze reflections and bluish iridescence, characteristic for the species. This aesthetic and historical specimen has been analyzed and the result will be sent to the buyer. It belongs from the Rolando Gallina mineral collection (Italy).

Size: 5.1 x 5 x 3.7 cm.

Col. Rolando Gallina (Italia).
Classic locality

These specimens of malachite present mamelonar, botryoidal to stalactic growths, with a very intense characteristic green color and silky luster. If they are observed under magnification, they show us that the sparkly green is produced by small malachite crystals that cover the surface. The photograph does not reflect all the splendor and brilliance of the piece. They are disposed on a fibrous malachite matrix. Very aesthetic.

Size: 11 x 8.5 x 4.2 cm.

These specimens of malachite present mamelonar, botryoidal to stalactic growths, with a very intense characteristic green color and silky luster. If they are observed under magnification, they show us that the sparkly green is produced by small malachite crystals that cover the surface. The photograph does not reflect all the splendor and brilliance of the piece. They are disposed on a fibrous malachite matrix. Very aesthetic.

Size: 6.2 x 6.6 x 3.5 cm.

These specimens of malachite present mamelonar, botryoidal to stalactic growths, with a very intense characteristic green color and silky luster. If they are observed under magnification, they show us that the sparkly green is produced by small malachite crystals that cover the surface. The photograph does not reflect all the splendor and brilliance of the piece. They are disposed on a fibrous malachite matrix. Very aesthetic.

Size: 5.9 x 5.5 x 3.6 cm.

These specimens of malachite present mamelonar, botryoidal to stalactic growths, with a very intense characteristic green color and silky luster. If they are observed under magnification, they show us that the sparkly green is produced by small malachite crystals that cover the surface. The photograph does not reflect all the splendor and brilliance of the piece. They are disposed on a fibrous malachite matrix. Very aesthetic.

Size: 9.2 x 6.5 x 6.2 cm.

A novelty from Sainte-Marie-aux-Mines 2022. These specimens come from a recent find in this mining area of the Black Forest and are reminiscent of those found decades ago in this area. They show radial aggregates of extremely brilliant pyrolusite crystals that partially replace manganite. By X-ray diffraction we have been determined the presence of both species, even with a certain predominance of manganite. They usually appear on a matrix of pink granite or as groups of large crystals in parallel growth. In the specimens we can observe the inclined flattened terminal faces. They are highly aesthetic pieces those will become part of the best specimens of these species for European mineralogy. We will send the XRD to the buyer.

Size: 8.8 x 7.4 x 5.2 cm.
Main crystal: 4.2 cm.
Found in 2021.

Analyzed specimen with report

A novelty from Sainte-Marie-aux-Mines 2022. These specimens come from a recent find in this mining area of the Black Forest and are reminiscent of those found decades ago in this area. They show radial aggregates of extremely brilliant pyrolusite crystals that partially replace manganite. By X-ray diffraction we have been determined the presence of both species, even with a certain predominance of manganite. They usually appear on a matrix of pink granite or as groups of large crystals in parallel growth. In the specimens we can observe the inclined flattened terminal faces. They are highly aesthetic pieces those will become part of the best specimens of these species for European mineralogy. We will send the XRD to the buyer.

Size: 6.7 x 5.5 x 4.1 cm.
Found in 2021.

Analyzed specimen with report

A novelty from Sainte-Marie-aux-Mines 2022. These specimens come from a recent find in this mining area of the Black Forest and are reminiscent of those found decades ago in this area. They show radial aggregates of extremely brilliant pyrolusite crystals that partially replace manganite. By X-ray diffraction we have been determined the presence of both species, even with a certain predominance of manganite. They usually appear on a matrix of pink granite or as groups of large crystals in parallel growth. In the specimens we can observe the inclined flattened terminal faces. They are highly aesthetic pieces those will become part of the best specimens of these species for European mineralogy. We will send the XRD to the buyer.

Size: 9 x 5.8 x 3.8 cm.
Main crystal: 3 cm. rad.
Found in 2021.

Analyzed specimen with report

A novelty from Sainte-Marie-aux-Mines 2022. These specimens come from a recent find in this mining area of the Black Forest and are reminiscent of those found decades ago in this area. They show radial aggregates of extremely brilliant pyrolusite crystals that partially replace manganite. By X-ray diffraction we have been determined the presence of both species, even with a certain predominance of manganite. They usually appear on a matrix of pink granite or as groups of large crystals in parallel growth. In the specimens we can observe the inclined flattened terminal faces. They are highly aesthetic pieces those will become part of the best specimens of these species for European mineralogy. We will send the XRD to the buyer.

Size: 7.4 x 5.4 x 3.2 cm.
Main crystal: 4.7 cm.
Found in 2021.

Analyzed specimen with report

A novelty from Sainte-Marie-aux-Mines 2022. These specimens come from a recent find in this mining area of the Black Forest and are reminiscent of those found decades ago in this area. They show radial aggregates of extremely brilliant pyrolusite crystals that partially replace manganite. By X-ray diffraction we have been determined the presence of both species, even with a certain predominance of manganite. They usually appear on a matrix of pink granite or as groups of large crystals in parallel growth. In the specimens we can observe the inclined flattened terminal faces. They are highly aesthetic pieces those will become part of the best specimens of these species for European mineralogy. We will send the XRD to the buyer.

Size: 7.2 x 7 x 4.1 cm.
Main crystal: 2.7 cm.
Found in 2021.

Analyzed specimen with report

In this specimen we can observe numerous prismatic crystals of hydroxylherderite, an unusual calcium and beryllium hydroxylphosphate, with a very uniform beige color, very well defined faces and edges and with twinning. They are disposed on a matrix formed by albite crystals. The specimen is from the Piauí Valley, an area very rich in lithium-bearing pegmatites.

Size: 6.4 x 4.7 x 3.9 cm.
Main crystal: 1.4 cm.