Rosell Minerales

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

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

Precio reducido-Reduced price 65€

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

Group of very sharp pyrolusite tabular crystals showing polysynthetic growths, unusual for the species. Good luster, metallic gray color. The echeloned faces gives them a different aesthetics. In the matrix we can observe more classic acicular radiated pyrolusite crystals.
Few specimens were obtained and, at first, it was thought that by their shapes and color tones they were marcasite, but further analysis characterized them as pyrolusite. Probably the best pyrolusite Spanish specimens.

Size: 4,6 x 2,7 x 1,6 cm.
Main crystal: 11 x 10 mm (group)
Found in 03/2011

This pyrite crystal is disposed very aerial on a brilliant hematite and pyrite matrix. It is not always usual find specimens from this Italian mining area placed on the matrix. Pyrite crystal shows pyritohedron classic forms with complex growths on faces. Its luster and gold color is good and it shows defined faces and edges. An excellent opportunity to have a sample from this classic locality.

Size: 6,0 x 5,3 x 4,8 cm.
Main crystal: 50 x 38 mm.

A very brilliant group of interpenetrated epidote crystals with an intense and deep green color. It shows a very rare habit for the species. We can observe a flattened shape generated by a extremely developed frontal pinacoid. Some small epidote crystals have grown in one face. Good luster. To increase its scientific interest we must say that it is magnetic due to magnetite inclusions.

Size: 6,3 x 5,9 x 3,4 cm.
Found in 2011

Magnetic properties: It is attracted by magnets

A very brilliant group of epidote crystals with an intense and deep green color. It shows a very rare habit for the species. We can observe a flattened shape generated by a extremely developed frontal pinacoid. Some small epidote crystals have grown in one face. Excellent luster. To increase its scientific interest we must say that it is magnetic due to magnetite inclusions.

Size: 7,3 x 5,7 x 2,8 cm.
Found in 2011

Magnetic properties: It is attracted by magnets

This sample is one of the first amethyst quartz specimens were found in the Les Mallorquines area, near of the well known quartz crystals area of Sils and Massabé quarry. They come from outcrops and not of any mining works. The crystal is a floater and is partially recrystallized. It shows well developed rhombohedral terminal faces and, as usual, some bright faces and other dull. Good transparence. A historical specimen from this area found in the middle 80's.

Size: 7,5 x 4,7 x 2,5 cm.
Found in 1985`s

Ex-col. Daunis (Barcelona)

This specimen is from a worldwide classic mine for Rare Earth Elements (REE) species. We observe two groups of defined tabular hexagonal crystals with small pyramidal faces. They show a good transparency and color that varies between yellow-green to orange-brown, depending on the type of the light that strikes them. Currently it is not easy to find bastnäsite-(Ce) specimens from this mine and with this crystal size.

Size: 6,8 x 4,4 x 3,8 cm.
Main crystal: 6 x 4 mm.
Found in 2007.

It shows Pleochroism

Hopeite and parahopeite are rare hydrated zinc phosphates, with the very best specimens worldwide coming from the famous Broken Hill Mine of Zambia. This specimen shows prismatic crystals of hopeite with brown color, some of them partially covered by colorless small parahopeite crystals. Broken Hill is the Type Locality for parahopeite. Rare species for systematic collector.

Size: 7,3 x 5,7 x 3,2 cm.
Main crystal: 7 x 3 mm.
Found in 1970's

A huge size specimen formed by several groups of brilliant sphalerite crystals, showing a perfect brilliance and curved faces and edges. Transparence is quite good and shows toasted honey tones. Accompanied by several dolomite rhombohedrons on matrix.
Troya Mine was closed in 1993, only a few years before these specimens were collected in 1990. Nowadays the mine is collapsed and flooded. This specimen was in a former German mineral collection since then.

 

Size: 10,4 x 9,3 x 3,5 cm.
Main crystal: 4x4 mm.
Found in ±1990

Hopeite and parahopeite are rare hydrated zinc phosphates, with the very best specimens worldwide coming from the famous Broken Hill Mine of Zambia. This specimen shows prismatic crystals of hopeite with brown color, some of them partially covered by colorless small parahopeite crystals. Broken Hill is the Type Locality for parahopeite. Rare species for systematic collector.

Size: 6,2 x 3,8 x 2,8 cm.
Main crystal: 8 x 2 mm.
Found in 1970

The color is exceptional in this pyromorphite specimen from this German mine. On a sandstone matrix a layer of prismatic crystals and some more barrel-shaped. Two generations are observed distinguishable by color crystals. Brilliance and well defined faces and edges. A sample for pyromorphite collectors.

Size: 10,2 x 8,4 x 3,5 cm
Main crystal: 2 mm.
Found in 2010

Precio reducido-Reduced price 65€

Group of very sharp pyromorphite crystals with a hexagonal shape and the characteristic color. The crystals fill cavities of the matrix. Mine has became a classic Spanish for pyro.

Size: 3,0 x 2,6 x 2,5 cm.
Main crystal: 7 x 3 mm.

Group of hexagonal pr¡smatic crystals showing a good brilliance, characteristic color and very well defined faces and edges. From a classic Spanish mine.

Size: 6,8 x 6,0 x 4,0 cm.
Main crystal: 8 x 3 mm.

A miniature formed by a druse of translucent and brilliant hexagonal barrel-shaped pyromorphite crystals. Some of them show parallel growths. With a color zoning that varies between grass green in the center to beige-green on terminal pinacoidal faces. These specimens have been determined by isotopic studies with equal results to those of this mine. This sample is from an old German mineral collection.

Size: 4,2 x 2,5 x 1,9 cm.
Main crystal: 5 x 3 mm.
Found in ±1980

Druse of translucent and brilliant hexagonal barrel-shaped pyromorphite crystals. Some of them show parallel growths. With a color zoning that varies between grass green in the center to beige-green on terminal pinacoidal faces. These specimens have been determined by isotopic studies with equal results to those of this mine. This sample is from an old German mineral collection.

Size: 5,2 x 3,8 x 1,0 cm.
Main crystal: 3 x 2 mm.
Found in ±1980

In this miniature we can enjoy two sides. One is covered by several hexagonal barrel-shaped pyromorphite crystals. Some of them show parallel growths. With a color zoning that varies between grass green in the center to beige-green on terminal pinacoidal faces. In the other side, small aggregates of transparent and sharp hexagonal pyro crystals partially covered by black coronadite or growing on it. These specimens have been determined by isotopic studies with equal results to those of this mine. Very curious specimen. This sample is from an old German mineral collection.

Size: 4,5 x 4,0 x 3,2 cm.
Main crystal: 11 x 7 mm.
Found in ±1980

Groups of brilliant and sharp hexagonal pyromorphite crystals, with a fibrous shape due to parallel growths. Color beige, a little bit green. On a quartz matrix. These specimens have been determined by isotopic studies with equal results to those of this mine. This sample is from an old German mineral collection.

Size: 6,3 x 5,4 x 2,4 cm.
Main crystal: 5 x 1 mm.
Found in ±1980

Precio reducido-Reduced price 80€

Groups of brilliant hexagonal barrel-shaped pyromorphite crystals. Some of them show parallel growths. With a color zoning that varies between grass green in the center to beige-green on terminal pinacoidal faces. On a matrix of minute quartz crystals. These specimens have been determined by isotopic studies with equal results to those of this mine. This sample is from an old German mineral collection.

Size: 8,7 x 2,4 x 1,5 cm.
Main crystal: 5 x 5 mm.
Found in ±1980

Precio reducido-Reduced price 55€

A very rich pyromorphite druse formed by several hexagonal shape crystals. Some of them show parallel growths and fibrous like forms. With a marked color zoning that varies between grass green in the center to beige-green on terminal pinacoid. These specimens have been determined by isotopic studies with equal results to those of this mine. This excellent sample is from an old German mineral collection.

Size: 6,7 x 4,4 x 3,5 cm.
Main crystal: 10 x 3 mm.
Found in ±1980

A very sharp and complete trapezohedral spessartine crystal. Really nice and uniform color, translucent and good luster. This specimen shows a very interesting gem quality.
These crystals came from a deposit near the town of Loliondo, close to the Serengeti National Park and the border of Tanzania and Kenya.

Size: 2,4 x 2,4 x 2,3 cm.
Found in 2009

Two generations of vanadinite crystals. A good-sized brilliant crystals, with echeloned growths and defined faces and edges. With good color yellow and peppered by deep black coronadite globular aggregates. Another generation shows small crystals (<1 mm) but with a nice luster, transparence, and yellowish tone. Both are on a matrix of goethite.

Size: 6,2 x 4,2 x 3,4 cm.
Main crystal: 7 x 6 mm
Found in 04/2012

In this excellent specimen we can observe different vanadinite crystals phases. The first is formed by botryoidal aggregates of small vanadinite crystals. Brilliant, translucent and with a yellow to greenish tones. On a second generation, we have huge size and brilliant crystals, with yellow to orange color, which show rounded faces and edges, one of them having a drop shape. One of the cavities of the goethite matrix is covered by very sharp and brilliant lanceolated prismatic crystals of mottramite. Also accompanied bybotryoidal coronadite. Novelty in SMM-2012.

Size: 9,5 x 5,2 x 4,0 cm.
Main crystal: 18 x 10 mm.
Found in 04/2012