Rosell Minerales

Very sharp single zunyite crystal with good luster, coloured by red hematite inclusions and with some small brilliant foliaceous hematite partially included in faces. Very clean tetrahedron form, truncated by cubic faces. Tetrahedron edge is 9.7 mm. A good sized and perfect 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: 9.7 x 9.5 x 9.2 mm.
Main crystal: 9.7 mm arista/edge.
Found in 2018.

Analyzed specimen with report

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: 2.4 x 1.4 x 1.3 cm.
Found in ±2019.

Analyzed specimen with report

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: 2.1 x 1.5 x 1.2 cm.
Found in ±2019.

Analyzed specimen with report

Specimen of anhydrite formed by numerous prismatic to tabular crystals, well defined and interpenetrated. On the back we can see the matrix formed by dolomite and brilliant pyrite crystals. Specimens from this Italian mine, located north of Boccheggiano, were collected at the end of the 20th century. The mine worked from the early 1980s, currently the mine is closed.

Size: 11 x 5.3 x 5 cm.
Main crystal: 1.3 cm.

Excellent specimen of hydroboracite, with a very good size, formed by numerous radial aggregates of acicular crystals. Very good brilliance, transparence and with color zoning, between colorless to slightly honeyed. This specimen has a former owner's label fixed to the back side. A display museum specimen.

Size: 8.8 x 6.7 x 4.3 cm.
Main crystal: 2.8 cm.

Rare and good sized mangan-diaspore (diaspore with manganese) specimen showing brilliant, transparent to translucent, burgundy red tabular crystals disposed in an arc on matrix. We can also observe small geodes full of crystals. The Glosam Mine specimens are the only ones in the Kalahari area in which the manganese diaspore shows this intense color and brilliance. An exceptional specimen for a little-seen species.

Size: 10.2 x 8 x 6.2 cm.
Main crystal: 12 mm.

These celestite specimens come from a classic locality on the Cantabrian coast such as Langre, together with Laredo. These are idiomorphic crystals formed within a nodule. Very brilliant, defined and transparent, with a delicate bluish color.

Size: 5.2 x 4.2 x 3.8 cm.
Main crystal: 1.3 cm.

These celestite specimens come from a classic locality on the Cantabrian coast such as Langre, together with Laredo. These are idiomorphic crystals formed within a nodule. Brilliant, defined and transparent, with a delicate bluish color.

Size: 4.9 x 3.8 x 3.1 cm.
Main crystal: 9 mm.

The Rubián Magnesite mines are a classic of Galician mineralogy. Currently these mines are active exploiting one of the largest deposits of magnesite in Spain. This specimen, which dates from the late 1970s, shows us a rich aggregate of lenticular crystals of this magnesium carbonate, brilliant, translucent, and with a very aesthetic orange color. It belongs from the Joan Astor collection, with his handwritten and another typed labels.

Size: 5 x 4.8 x 2.9 cm.
Found in ±1977.

Classic locality

These fluorite crystals have a cubic appearance with growths in tiles on the surfaces of the faces. In this specimen we observe a more intense violet to purple color on the edges and on the outside of the crystals, while inner core has a soft green color. They are disposed on a matrix with quartz crystals. Under shortwave ultraviolet light they fluoresce bluish.

Size: 6.8 x 5.5 x 3 cm.
Main crystal: 2.1 cm. edge/arista.

Fluorescent under long wave UV

Group of slightly beveled cubic fluorite crystals with polysynthetic growths on the faces and edges. They have a more intense purple color on the edges, very characteristic of these specimens from the Qinglong mine in China. Between translucent to transparent. They are disposed on a matrix with calcite and quartz.

Size: 7.8 x 7 x 3.5 cm.
Main crystal: 10 mm edge/arista.

Group of fluorite crystals with a cubic shape, but with the edges and vertices beveled by forms of the trisoctahedron. These beveled edges display a deep purple color that contrasts with the rest of the crystal. They are translucent and stand out on a matrix with small quartz crystals. Under long-wave ultraviolet light they emit a bluish to violet color. A very aesthetic specimen.

Size: 8.2 x 5 x 5 cm.
Main crystal: 8 mm edge/arista.

Fluorescent under long wave UV

This specimen of fluorite from the Berta quarry shows us groups of crystals but also isolated crystals. The matrix is "old" red granodiorite and is lined by tiny, almost colorless fluorite octahedrons. If there is something to be highlighted about this piece, it is that the octahedral fluorite crystals show the faces of the rhombododecahedron, the cube and the tetrakishexahedron at the vertices.

Size: 10.4 x 3.4 x 3.3 cm.
Main crystal: 8 mm.

Fluorescent under long wave UV

Group of octahedral fluorite crystals, transparent and showing an intense green color. They are accompanied by small calcite crystals, very faceted, transparent and brilliant. Both fluorite and calcite fluoresce under long-wave ultraviolet light. This type of gray granite matrix is classic for the most modern specimens and comes from the lower levels of the Berta quarry.

Size: 6.3 x 4.5 x 3.4 cm.
Main crystal: 13 mm edge/arista.

Fluorescent under long wave UV

Group of octahedral fluorite crystals, translucent to transparent. They show defined faces and edges and an intense green color. They are accompanied by small quartz and pyrite crystals peppering some of the octahedron faces. This type of gray granite matrix is classic for the most modern specimens and comes from the lower levels of the Berta quarry.

Size: 5.7 x 4.6 x 2.1 cm.
Main crystal: 12 mm edge.

Fluorescent under long wave UV

These aggregates of hexagonal gmelinite crystals are a classic of Northern Ireland mineralogy. In this specimen we can enjoy a vacuole covered by orange crystals, very well defined and brilliant. They are accompanied by small analcime crystals, richly faceted and transparent. Gmelinite specimens from this quarry were analyzed by X-ray fluorescence and SEM-EDS by Stephen Moreton. The results indicated that both gmelinite-Ca and gmelinite-Na are present and even zoned in the same crystal.

Size: 7.9 x 7.4 x 3.2 cm.
Main crystal: 4.3 mm.

Ex. Erich Laskowski col.

This is another one of those specimens from old collections, as evidenced by the various accompanying labels, that contain discredited or dubious mineral names. Even so, the historical and scientific interest it presents has made us offer it.
In the piece we observe a core of galena with halos of alteration of the vein in the socket. In the cavities we find numerous well-formed crystals of cerussite. And in some areas we observe greenish and honeyed tones probably corresponding to pyromorphite, but also to possible scorodite. The 'ganomatite' is considered a scorodite with impurities, while the pitticite is a questionable species formed by amorphous hydrated iron arsenate. Although this last mineral is currently accepted, it is questioned.

Size: 5.4 x 4 x 3.9 cm.
Found in ±1977.

Col. Joan Astor (Barcelona).

Very interesting combo formed by a tinticite nodule with some calcioferrite small aggregate. Calcioferrite is showing olive green globular aggregates, with radiated crystals, included in tinticite matrix. These specimens have been analyzed by SEM-EDS and XRD and we will send all details to the buyer. From this classic Catalan mine.

Size: 3.9 x 3.4 x 3.2 cm.
Found in 2019.

Analyzed specimen with report

Very interesting combo formed by a tinticite nodule with some calcioferrite small aggregate. Calcioferrite is showing olive green globular aggregates, with radiated crystals, included in tinticite matrix. These specimens have been analyzed by SEM-EDS and XRD and we will send all details to the buyer. From this classic Catalan mine.

Size: 3.5 x 3 x 2.6 cm.
Found in 2019.

Analyzed specimen with report

This is one of the rare borates determined in Kohnstein quarry. The crystals, sharp and well defined, are completely transparent, colorless, large for the species and on matrix. It comes from this currently inactive quarry in the Harz mountains.

Size: 7 x 5 x 2 cm.
Found in 2014.

Very rich specimen formed by several hydroboracite crystals, with a very elongated prism and well-defined faces and edges. Totally colorless, transparent and with an extraordinary brightness. A piece of the best quality for the species. It belongs from a currently inactive quarry in the Harz mountains.

Size: 7.3 x 5.7 x 1.7 cm.
Main crystal: 10 mm.
Found in 2014.

Hilarionite is a very rare hydrated iron hydroxyarsenate sulphate, unique to this mine in the famous old district of Lavrion. This species was approved at the end of 2011. In this good-sized specimen, the hilarionite appears as botryoidal aggregates formed by small crystals, with a more intense greenish-yellow hue in some areas. The specimen was acquired by Erich Laskowsky from Anastasios Tsinidis, a well-known "strahler" (quartz hunter) of Greek origin. A fine piece from the type locality for the species.

Size: 9 x 7.5 x 5 cm.

Ex. Erich Laskowski col.
Type Locality

Very esthetic specimen of celestine from Morocco. It shows us a large group of prismatic crystals of this strontium sulphate, very well defined and faceted, and with an excellent transparence that allows us to see a soft bluish color. They are disposed on a compact matrix. This locality is northeast of Imilchil town.

Size: 10.2 x 9.5 x 6.8 cm.
Main crystal: 2 cm.

Very rich group of harmotome crystals filling a vacuole in the volcanic rocky matrix. Rich also in faces, with brilliance and between transparent like the smaller ones, and translucent the larger ones. Idar-Oberstein is known as a city of precious stones with traditional workshops those work agate, jasper, quartz, etc. A specimen of very good quality for this locality, nowadays difficult to find. With old label.

Size: 7.7 x 7.3 x 6.3 cm.
Main crystal: 7 mm.

Ex. Wein Col (Germany) and ex. Erich Laskowski col. (USA).

Very good sized specimen of fluorite from this classic Catalan quarry. On the "old" matrix of orange granodiorite there are various groups of crystals, some of them isolated, with octahedral shapes. They have a semi-matte luster and a uniform green color. Very fluorescent under LW-UV light. Specimens of fluorite from this quarry are highly prized by collectors.

Size: 12 x 6.6 x 5.6 cm.
Main crystal: 1.1 cm.
Found in ±1999.

Fluorescent under long wave UV