Rosell Minerales

 
Currency
 
You are in > Home > Minerals

Catálogo de minerales

RM2461   Natrolite

Cape Grim, Circular Head, Tasmania, Australia

Globular aggregate of prismatic natrolite crystals, with well defined terminal faces. It is disposed very aerially on the matrix. Specimens on matrix are unusual. It comes from a locality well known for its zeolites. Nowadays this Cape Grim area is restricted access due to wind turbines field. From the former J. Astor Collection (Barcelona).


Size: 3.5 x 3.2 x 2.8 cm.
Main crystal: 1.5 cm. aggr.
Found in ca. 1983.

Col. Joan Astor (Barcelona)


Price: 45 €Buy
 

RM2473   Fluorite

El Hammam Mine, Djebel el Hammam, Meknès, Meknès-Tafilalet, Morocco

Group of cubic fluorite crystals, with good brilliance, transparence and a very characteristic green color. From this classic Moroccan mines. With the label of the former collection Trigo (Mataró).


Size: 4.7 x 3.5 x 2.7 cm.
Main crystal: 2.2 cm.

Fluorescent under long wave UV


Price: 40 €Reserved
 

RM2437   Pyrolusite replacing manganite

Boulemane area, Fès-Meknès, Morocco

These specimens of manganite partially replaced pyrolusite, come from a locality not yet described in the mineralogical bibliography. This deposit is located in the province of Boulemane, in the Fez-Meknés region, about ten kilometers from the well-known Aouli mines. It is a formation very similar to that of Imini (near Ouarzazate). These manganese deposits, both in Imini and in the Boulemane area, were formed in a karst system. Associated with shallow marine dolomites of the Cretaceous age and that currently form sub-horizontal mantles cutted by erosion, overlaping areas of volcanic rocks. Manganese minerals are found in dolomite breccia and ferruginous clays. We have carried out X-ray diffraction studies showing us the presence of both species: manganite and pyrolusite.


Size: 7.8 x 4 x 2.5 cm.
Main crystal: 3 cm.
Found in 03/2020

Analyzed specimen with report


 

RM2438   Pyrolusite replacing manganite

Boulemane area, Fès-Meknès, Morocco

These specimens of manganite partially replaced pyrolusite, come from a locality not yet described in the mineralogical bibliography. This deposit is located in the province of Boulemane, in the Fez-Meknés region, about ten kilometers from the well-known Aouli mines. It is a formation very similar to that of Imini (near Ouarzazate). These manganese deposits, both in Imini and in the Boulemane area, were formed in a karst system. Associated with shallow marine dolomites of the Cretaceous age and that currently form sub-horizontal mantles cutted by erosion, overlaping areas of volcanic rocks. Manganese minerals are found in dolomite breccia and ferruginous clays. We have carried out X-ray diffraction studies showing us the presence of both species: manganite and pyrolusite.


Size: 6.3 x 2.5 x 2.4 cm.
Main crystal: 1.2 cm.
Found in 03/2020

Analyzed specimen with report


Price: 30 €Buy
 

RM2436   Pyrolusite replacing manganite

Boulemane area, Fès-Meknès, Morocco

These specimens of manganite partially replaced pyrolusite, come from a locality not yet described in the mineralogical bibliography. This deposit is located in the province of Boulemane, in the Fez-Meknés region, about ten kilometers from the well-known Aouli mines. It is a formation very similar to that of Imini (near Ouarzazate). These manganese deposits, both in Imini and in the Boulemane area, were formed in a karst system. Associated with shallow marine dolomites of the Cretaceous age and that currently form sub-horizontal mantles cutted by erosion, overlaping areas of volcanic rocks. Manganese minerals are found in dolomite breccia and ferruginous clays. We have carried out X-ray diffraction studies showing us the presence of both species: manganite and pyrolusite.


Size: 7 x 4 x 3 cm.
Main crystal: 1.8 cm.
Found in 03/2020

Analyzed specimen with report


Price: 35 €Buy
 

RM2435   Pyrolusite replacing manganite

Boulemane area, Fès-Meknès, Morocco

These specimens of manganite partially replaced pyrolusite, come from a locality not yet described in the mineralogical bibliography. This deposit is located in the province of Boulemane, in the Fez-Meknés region, about ten kilometers from the well-known Aouli mines. It is a formation very similar to that of Imini (near Ouarzazate). These manganese deposits, both in Imini and in the Boulemane area, were formed in a karst system. Associated with shallow marine dolomites of the Cretaceous age and that currently form sub-horizontal mantles cutted by erosion, overlaping areas of volcanic rocks. Manganese minerals are found in dolomite breccia and ferruginous clays. We have carried out X-ray diffraction studies showing us the presence of both species: manganite and pyrolusite.


Size: 8.4 x 5 x 3.5 cm.
Main crystal: 3.3 cm.
Found in 03/2020

Analyzed specimen with report


 

RM2434   Pyrolusite replacing manganite

Boulemane area, Fès-Meknès, Morocco

These specimens of manganite partially replaced pyrolusite, come from a locality not yet described in the mineralogical bibliography. This deposit is located in the province of Boulemane, in the Fez-Meknés region, about ten kilometers from the well-known Aouli mines. It is a formation very similar to that of Imini (near Ouarzazate). These manganese deposits, both in Imini and in the Boulemane area, were formed in a karst system. Associated with shallow marine dolomites of the Cretaceous age and that currently form sub-horizontal mantles cutted by erosion, overlaping areas of volcanic rocks. Manganese minerals are found in dolomite breccia and ferruginous clays. We have carried out X-ray diffraction studies showing us the presence of both species: manganite and pyrolusite.


Size: 5.3 x 4.5 x 2.7 cm.
Main crystal: 1.5 cm.
Found in 03/2020

Analyzed specimen with report


 

RM2428   Zunyite

Qualat-e-Balat salt dome, Bandar Abbas, Hormozgan, Iran

Two interpenetrating zunyite crystals, one of them dominant. Its color is due to hematite inclusions. With the shape of a tetrahedron truncated by the faces of the cube. The edge of the tetrahedron measures 12 mm. An interesting specimen for systematic collectors and crystallography lovers. A rare species, it is an aluminum sorosilicate with fluorine and chlorine. We carried out an X-ray diffraction and fluorescence studies that confirmed the species. We recommend an interesting article about the deposit in the magazine Rocks and Minerals (Vol. 95, nº 2, 2020).


Size: 1.2 x 1.1 x 1.1 cm.
Main crystal: 12 mm edge/arista.

Analyzed specimen with report


 

RM2430   Zunyite

Qualat-e-Balat salt dome, Bandar Abbas, Hormozgan, Iran

A floating zunyite crystal. Its color is due to hematite inclusions. With the shape of a tetrahedron truncated by the faces of the cube. The edge of the tetrahedron measures 13 mm. An interesting specimen for systematic collectors and crystallography lovers. A rare species, it is an aluminum sorosilicate with fluorine and chlorine. We carried out an X-ray diffraction and fluorescence studies that confirmed the species. We recommend an interesting article about the deposit in the magazine Rocks and Minerals (Vol. 95, nº 2, 2020).


Size: 1.2 1.1 x 1 cm.
Main crystal: 12 mm edge/arista.

Analyzed specimen with report


 

RM2431   Zunyite

Qualat-e-Balat salt dome, Bandar Abbas, Hormozgan, Iran

Two interpenetrating zunyite crystals, one of them dominant. Its color is due to hematite inclusions. With the shape of a tetrahedron truncated by the faces of the cube. The edge of the tetrahedron measures 11 mm. The small one has a nick in one vertex. An interesting specimen for systematic collectors and crystallography lovers. A rare species, it is an aluminum sorosilicate with fluorine and chlorine. We carried out an X-ray diffraction and fluorescence studies that confirmed the species. We recommend an interesting article about the deposit in the magazine Rocks and Minerals (Vol. 95, nº 2, 2020).


Size: 1.2 x 1 x 1 cm.
Main crystal: 10 mm. edge/arista

Analyzed specimen with report


 

RM2429   Zunyite

Qualat-e-Balat salt dome, Bandar Abbas, Hormozgan, Iran

Two interpenetrating zunyite crystals, one of them dominant. Its color is due to hematite inclusions. With the shape of a tetrahedron truncated by the faces of the cube. The edge of the tetrahedron measures 11 mm. An interesting specimen for systematic collectors and crystallography lovers. A rare species, it is an aluminum sorosilicate with fluorine and chlorine. We carried out an X-ray diffraction and fluorescence studies that confirmed the species. We recommend an interesting article about the deposit in the magazine Rocks and Minerals (Vol. 95, nº 2, 2020).


Size: 11 x 10 x 10 mm.
Main crystal: 10 mm. edge/arista

Analyzed specimen with report


 

RM2432   Zunyite and hematite

Qualat-e-Balat salt dome, Bandar Abbas, Hormozgan, Iran

Very sharp single zunyite crystal with good luster, coloured by red hematite inclusions and with some small brilliant foliaceous hematite partially included in faces. On a minor matrix. Clean tetrahedron form, truncated by cubic faces. Tetrahedron edge is 12 mm. A good sized and nice crystallographic specimen of this unusual species, a rare sorosilicate of aluminum and chlorine, with fluorine. Analized by X-ray difraction and X-ray fluorescence.


Size: 1.7 x 1.3 x 1.3 cm.
Main crystal: 12 mm edge.

Analyzed specimen with report


 

RM2433   Zunyite and hematite

Qualat-e-Balat salt dome, Bandar Abbas, Hormozgan, Iran

Group of zunyite crystals on matrix, interpenetrated, brilliant and with cube faces truncating the edges of the tetrahedron. Its intense color is due to hematite inclusions. The edge of the major tetrahedron is 12 mm. A good size crystallographic specimen of this mineral species, a rare aluminum chlorine sorosilicate with fluorine. Analyzed by fluorescence and X-ray diffraction.


Size: 2.6 x 1.5 x 1.2 cm.
Main crystal: 12 mm edge.

Analyzed specimen with report


 

RM2427   Zunyite and hematite

Qualat-e-Balat salt dome, Bandar Abbas, Hormozgan, Iran

Very well defined zunyite crystals, with luster and on matrix. The intense tile colour is due to hematite inclusions. With clean tetrahedron shape, truncated by cube faces. The edge of both tetrahedrons measures 8 mm. They are included in a small matrix of hematite. A crystallographic specimen of this mineral species, a rare aluminum chlorine sorosilicate with fluorine. We performed some X-ray diffraction studies that confirmed the species. We recommend an interesting article about this Iranian deposit in the magazine Rocks and Minerals (Vol. 95, nº 2, 2020).


Size: 3.8 x 2.7 x 1 cm.
Main crystal: 8 mm edge.

Analyzed specimen with report


 

RM2426   Zunyite and hematite

Qualat-e-Balat salt dome, Bandar Abbas, Hormozgan, Iran

Very well defined zunyite crystal, with luster and on matrix. Its intense colour is due to hematite inclusions. With very clean tetrahedron shape, truncated by cube faces. The edge of the tetrahedron measures 8 mm. It is included in a matrix of hematite. A crystallographic specimen of this mineral species, a rare aluminum chlorine sorosilicate with fluorine. We performed some X-ray diffraction studies that confirmed the species. We recommend an interesting article about this Iranian deposit in the magazine Rocks and Minerals (Vol. 95, nº 2, 2020).


Size: 5.5 x 5.2 x 4 cm.
Main crystal: 8 mm edge.

Analyzed specimen with report


 

RM2417   Cinnabar and quartz

Escarlati Mine, Puerto de las Señales, Maraña, León, Castilla y León, Spain

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.

 

RM2420   Epidote

Ampliación Aquí Estoy quarry, Bóveda de la Ribera, Medina de Pomar, Burgos, Castilla y León, Spain

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.

Price: 30 €Buy
 

RM2419   Epidote

Ampliación Aquí Estoy quarry, Bóveda de la Ribera, Medina de Pomar, Burgos, Castilla y León, Spain

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.

Price: 65 €Buy
 

RM2416   Epidote

Ampliación Aquí Estoy quarry, Bóveda de la Ribera, Medina de Pomar, Burgos, Castilla y León, Spain

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.

Price: 50 €Buy
 

RM2415   Covellite

Leonard Mine, Butte, Butte-Silver Bow, Montana, United States

Laminar rosette-shaped covellite crystals, excellent luster and with an intense violet to purple color, with an aesthetic iridescence. They are disposed on a matrix with pyrite and quartz. The covellite crystal specimens from Butte are highly appreciated by collectors and possibly the best in the world for the species, with only a few exceptions like Sardinia ones, but even those are not as sharp. The quality of this piece is simply excellent. Nowadays, specimens with this fine crystals are rarely seen.


Size: 9.2 x 8.5 x 4 cm.
Main crystal: 2.2 cm.
Found in ca. 1941.

Classic locality
 

RM2418   Fluorite and Calcite

Yanci quarries, Igantzi, Navarra, Spain

Group of cubic fluorite crystals, slightly bevelled, with an intense violet color with geometric zoning, between transparent and translucent. They show polysynthetic growths forming tiled structures on the faces of the cube. On some fluorite crystals, a generation of small scalenohedral calcite crystals, very transparent and bright, has formed. They are disposed on a matrix with baryte and calcite. Not very common in the market. They show some fluorescence under ultraviolet light.


Size: 5.2 x 4.8 x 3.6 cm.
Main crystal: 0.9 cm.

Fluorescent under LW-UV and SW-UV lights
Price: 60 €Buy
 

RM2414   Fluorite and Calcite

Yanci quarries, Igantzi, Navarra, Spain

Group of cubic fluorite crystals, slightly bevelled, with an intense violet color with geometric zoning, between transparent and translucent. They show polysynthetic growths forming tiled structures on the faces of the cube. On some fluorite crystals, a generation of small scalenohedral calcite crystals, very transparent and bright, has formed. They are disposed on a matrix with baryte and calcite. Not very common in the market. They show some fluorescence under ultraviolet light.


Size: 8.2 x 5.2 x 4 cm.
Main crystal: 1.2 cm.

Fluorescent under LW-UV and SW-UV lights
Price: 75 €Buy
 

RM2412   Malachite and calcite

Tsumeb mine (Tsumcorp), Tsumeb, Otjikoto, Namibia

Globular aggregates of malachite, with an intense green color, brilliant and that stand out on a matrix of calcite. A specimen from Tsumeb and belonging from the Manchion collection (Barcelona).


Size: 7.2 x 4.8 x 4.3 cm.
Main crystal: 0.5 cm.

Classic locality
Price: 50 €Buy
 

RM2411   Fluorite

Berta quarry, El Papiol - Sant Cugat del Vallès, Barcelona, Catalunya, Spain

Druse of fluorite crystals with octahedral forms. Intense green color on a matrix of the classic granodiorite from this Catalan mine.


Size: 7 x 4.5 x 3.2 cm.
Main crystal: 0.7 cm.
Found in ca. 1997.

Fluorescent under long wave UV
Price: 35 €Buy
 

RM2284   Vanadinite on matrix

Coud'a 24m↓, Mibladen, Midelt, Drâa-Tafilalet, Morocco

On a recent trip to this mining area, we found these new specimens with incredible aesthetics. They were found in a singular cavity, opened in the depths of a 24-meter well, in Coud'a shafts. They have a more than exceptional brilliance, probably due to a last phase of crystallization in which a thin layer of almost transparent vanadinite was deposited. Crystals are very well defined, with staggered axial growths in the prism and with color zoning, more orange than red. Contrasting on a solid rocky matrix. Vanadinites from the Mibladen area are well known worldwide and although we have seen many of them, they never cease to amaze us. Amazing specimens!


Size: 10 x 8.5 x 7 cm.
Main crystal: 1.2 cm.
Found in 02/2020.

Price: 450 €Buy
 
4
...