Rosell Minerales

Doubly terminated quartz crystal of the Compostela hyacinth variety. In a gypsum matrix. It belongs from the former Joan Astor collection (Barcelona). The label indicates locality as Villar del Arzobispo (Valencia), a locality near Domeño.

Size: 6.5 x 5.2 x 3.9 cm.
Main crystal: 2 cm.
Found in ±1978

Col. Joan Astor (Barcelona).

Group of cubic crystals of fluorite, of good size, with tile growths on the faces. Good brilliance, transparent to translucent. Pinkish-purple color, more blue under LED light. It shows a marked geometric color zoning on the edges. With a baryte book-shape aggregate.

Size: 8.3 x 4.2 x 6.7 cm.
Main crystal: 2.8 cm.

An aesthetic malachite aggregate, showing fibrous crystals, intense colour, with zoning, and good luster. On a matrix with dolomite small crystals. A very aesthetic specimen from this classic Moroccan mines

Size: 9.5 x 6.8 x 6.5 cm.
Found in 02/2013.

These mines are near the Matagalls peak, in the Montseny massif, and they are also known as Matagalls mines. This sample shows us a matrix with fluorite on which an aesthetic group of book-shaped baryte crystals is disposed. These pieces appeared in the 80-90s of the last century. Nowadays it is very difficult to find good specimens.

Size: 9.3 x 6 x 5.6 cm.
Found in 1990's.

Very aerial specimen formed by groups of cubic fluorite crystals. Very well defined faces and edges, with polysynthetic growths and disposed on a matrix with quartz crystals. It is accompanied by a tabular baryte.

Size: 8.5 x 5.2 x 4.5 cm.
Main crystal: 1.4 cm.

Group of interpenetrating fluorite crystals, with an intense coluor that varies according to the type of incident light. From this classic Asturian mining area.

Size: 6.1 x 4 x 3.5 cm.

Very good size specimen, formed by numerous very well defined orthoclase crystals. It was in this classic locality in the community of Madrid where, around the 70s, the Daunis-Ruscalleda family, well-known mineral prospectors and collectors from Barcelona, found quite a few very aesthetic specimens of orthoclase/microcline, accompanied by Enrique Kucera. This specimen is one of these ...

Size: 14 x 12 x 8.5 cm.
Main crystal: 2.3 cm.
Found in 1970's.

Col. L. Daunis (Barcelona).
Classic locality

A very good sized baryte specimen, formed by some thick tabular book-shaped crystals. From a classic Murcian locality.

Size: 11 x 8 x 7 cm.

A classic specimen of the famous, but difficult to find, twinned orthoclase crystals from this locality of Bohemia. A floating specimen with the Carlsbad twin. Well defined. There has been some debate as to whether or not Loket is the type locality for the Karlsbad twin habit of feldspar, as "Karlsbad" / "Carlsbad" is the old name for Karlovy Vary. More information on this can be found in  [mindat].

Size: 4.8 x 3.4 x 1.7 cm.
Found in ±1991

Col. A. Trigo (Mataró).
Classic locality

Fine aggregates of bright and translucent gillespita, strawberry red. In a matrix of white sanbornita that contrasts with the color. Gillespita is a rare barium and iron phyllosilicate. This is a very rich, colorful and excellent piece for the species.

Size: 6.3 x 3.6 x 3 cm.
Found in ±1990

Col. R. Vochten.
Fluorescent under short wave UV

Group of twinned "hourglass" and "fishtail" gypsum crystals. Specimen with very good transparency, colorless and doubly terminated. It comes from the famous Lake Gilles in South Australia. The crystal is floating and its transparency allows us to see the inclusions of arrow-shaped clay particles. Lake Gilles produces some of the most unusual gypsum crystal shapes in the world.

Size: 6.2 x 3 x 2.2 cm.
Found in ±1984

Col. A. Trigo (Mataró).
Fluorescent under long wave UV

Floater aggregate of laminar molybdenite crystals. Very brilliant. A piece of a certain size for this classic Catalan mine. From the Trigo collection (Mataró).

Size: 3.4 x 2.7 x 1.5 cm.
Found in ±1984

Col. A. Trigo (Mataró).
Classic locality

Globular aggregates of brilliant prehnite crystals, with a very uniform green hue.

Size: 7 x 3.8 x 3.3 cm.
Found in ±2004

Col. A. Trigo (Mataró).

Good sized specimen with powdered cinnabar aggregates. Intense red color, with an orange point. From this classic mine in Alt Palància (Castelló). For cinnabar locality collectors.

Size: 7 x 6 x 5.2 cm.
Found in 1990's.

Col. A. Arguijo (L'Hospitalet de Llobregat).
Classic locality

Specimen formed by two cerussite crystals of a more than considerable size. They show the cyclic twin, with staggered growths. At the vertex of the largest crystal we can see the twin clearly. They are not shiny and have a rough crystalline surface on the back, but they are exceptional for their size and crystallography. They are disposed on a small baryte matrix.

Size: 8 x 6.5 x 4.9 cm.
Main crystal: 5.4 cm.
Found in 10/2017.

Fluorescent under long wave UV

Good size specimen of sodalite, with intense color. It is not polished, totally natural. From the former Daunis collection (Barcelona).

Size: 7.2 x 5 x 3.4 cm.

Col. L. Daunis (Barcelona).

Very good size specimen formed by laminar aggregates of stibnite crystals. The San Antonio mine is located in the area called "Quinola" next to the road BA-5001 between the peoples of Alburquerque and The Codosera. This is an important antimony mine closed in 1986, and it was the largest mine of this metal in Spain and Europe. It belongs from the former Arguijo collection and dates from the 90s.

Size: 8.3 x 5 x 3.5 cm.
Found in 1990's.

Col. A. Arguijo (L'Hospitalet de Llobregat).

Very good size specimen formed by laminar aggregates of stibnite crystals. The San Antonio mine is located in the area called "Quinola" next to the road BA-5001 between the peoples of Alburquerque and The Codosera. This is an important antimony mine closed in 1986, and it was the largest mine of this metal in Spain and Europe. It belongs from the former Arguijo collection and dates from the 90s.

Size: 8.2 x 5.8 x 3 cm.
Found in 1990's.

Col. A. Arguijo (L'Hospitalet de Llobregat).
Classic locality

Classic pineapple of hematoid quartz, var. Compostela hyacinth, with good brilliance, complete and in a gypsum crystals matrix.

Size: 7.2 x 4.5 x 4.2 cm.
Main crystal: 3.6 cm. aggr.
Found in ±2016

Classic locality

This specimen stands out for showing arborescent growths of very well defined silver cubic crystals. In addition, the piece comes from a Moroccan mine from which few samples of this type and quality have been collected. To add more importance to the piece, it must be said that the calcite has been partially removed by mechanical procedures, without acids that could cause the silver to blacken. Well defined, extremely brilliant and isolated silver crystals are not very common, usually appear deformed or in complex growths. An excellent and good sized specimen.

Size: 5,2 x 5,1 x 3,2 cm.
Found in ±2018

Aggregates of laminar semseyite crystals, very brilliant, some with fractures, and on a galena matrix. A classic of Romanian mineralogy. Formerly in the collection of Gerd Resag.

Size: 5.6 x 3.4 x 2.5 cm.
Found in ±1960

Col. Gerd Resag.

Specimen with a visible aggregate of asbecasite, with crystal faces. Yellowish color. Disposed on a matrix with hexagonal crystals of clinochlor. A species not easy to find. This specimen comes from the type locality.

Size: 4.7 x 4.3 x 2.6 cm.
Found in ± 2005.

Type Locality

Specimen with a visible aggregate of asbecasite, with crystal faces. Yellowish color. Disposed on a matrix with hexagonal crystals of clinochlor. A species not easy to find. This specimen comes from the type locality.

Size: 5.8 x 4.9 x 3.6 cm.
Found in ± 2005.

Type Locality

In this specimen we can observe brilliant aggregates of brown transparent römerite crystals, a very rare iron sulphate. They are accompanied by coquimbite showing an intense violet color under fluorescent light or LED type. They're accompanied by yellow metavoltine/copiapite crystals, along with minor fibrous halotrichite. Note that under the magnifying glass we can navigate in a world of brilliant crystals, some of which of krausite species (yellowish to grey transparent). We left this identification pleasure to the collector. Regarding its environmental stability, this sample has been stored during more than eight years without further alteration.

Size: 7.2 x 6 x 5.5 cm.
Found in 03/2010.

In this specimen we can observe brilliant aggregates of brown transparent römerite crystals, a very rare iron sulphate. They are accompanied by coquimbite showing an intense violet color under fluorescent light or LED type. They're accompanied by yellow metavoltine/copiapite crystals, along with minor fibrous halotrichite. Note that under the magnifying glass we can navigate in a world of brilliant crystals, some of which of krausite species (yellowish to grey transparent). We left this identification pleasure to the collector. Regarding its environmental stability, this sample has been stored during more than eight years without further alteration.

Size: 6.1 x 5.5 x 4.6 cm.
Found in 03/2010.