Rosell Minerales

Group of dipyramidal wulfenite crystals, very defined, bright and sharp. They are arranged on a matrix covered with olive green mottramite. On the back side, numerous cavities lined with green mimetite with orange wulfenite crystals. A very entertaining and aesthetic piece. From the E. Nicolau (Barcelona) collection with handwritten label by J. Viñals.

Size: 6.2 x 6 x 4.2 cm.
Main crystal: 8 mm.

Col J. Viñals. Col. E. Nicolau (Barcelona).

Various globular aggregates of smithsonite are disposed in a goethite. They fill the cavities in the matrix. They have a good brilliance along with a slightly bluish gray color. A curious specimen from this classic Mexican mine.

Size: 7.2 x 6.2 x 4.8 cm.
Main crystal: 2.3 cm.

Col. M. Marí - A. García (Castelló)
Classic locality

The classic and Mexican Ojuela mine never ceases to amaze us. In this specimen we can enjoy a vug in the limonite matrix completely upholstered by aggregates of arsendescloizite crystals, with a slightly yellowish green color, on which numerous acicular aggregates of green malachite crystals have grown. On the label, they were described as conichalcite, but analysis indicates that it is this copper carbonate. Also accompanied and partially covered by calcite crystals, very transparent and bright, partially corroded naturally. A very aesthetic and unusual specimen for this mine.

Size: 8.8 x 6.8 x 6.4 cm.
Found in ±2020.

Classic locality

Very old specimen from Ojuela mine. It presents various globular aggregates of chrysocolla, sprinkled with small crystals of hemimorphite and bluish needles of aurichalcite. Under the magnifying glass is very interesting. From the Trigo collection (Mataró).

Size: 5.4 x 5.3 x 3.9 cm.
Found in ±1980.

Col. Trigo (Mataró, Catalunya)
Classic locality

Druse of tabular wulfenite crystals, transparent, well defined and with a soft yellowish to greenish hue. They are accompanied, on a goethite matrix, with sheaf aggregates of mimetite crystals. Very aesthetic.

Size: 8.2 x 4.5 x 3 cm.

Classic locality

Rich specimen of parasymplesite from this classic Mexican mine. Several divergent aggregates of prismatic to tabular parasymplesite crystals, with a light green color on the surface and a very dark green, almost black, color inside. They are disposed on a goethite matrix with cavities layered by small honey-colored arseniosiderite crystals and adamite. This specimen belongs to the Joan Astor collection (Barcelona), with a handwritten label and another typewritten.

Size: 6.5 x 5.4 x 3.2 cm.
Main crystal: 3 mm.
Found in ±1977.

Col. J. Astor, Barcelona.
Classic locality

Ojuelaite is a very rare zinc and iron arsenate named after the world famous Ojuela mine (Mexico), its type locality. The species, which belongs to the arthurite group, was accepted by the IMA in 1982 and is isostructural with whitmoreite. It is found in the oxidation zone of the Ojuela deposit, associated with scorodite, adamite and / or smithsonite.
In the article published by Cesbron, Romero and Williams [La mapimite et l'ojuélaïte, deux nouveaux arséniates hydratés de zinc et de fer de la mine Ojuela, Mapimi, Mexique. Bulletin de Minéralogie 104, 582-586. (1981)] two new minerals were described, mapimite and ojuelaite. The studied specimens were obtained thanks to the well-known Mexican mineralogist Don Manuel Romero.
In this specimen, ojuelaite is associated with natropharmacosiderite-pharmacosiderite, as shown by the XRD attached. The arsenopyrite matrix is partially covered by aggregates of natropharmacosiderite-pharmacosiderite crystals, with a green color, brilliant and with cubic shapes. The ojuelaite of this specimen is showing radial fibrous aggregates, with a silky luster and yellow color. We will send the analyzes to the buyer. Former Marcus J. Origlieri collection.
We can say that this specimen is among the best worldwide for this species, due to its size, richness, aesthetics and quality.

Size: 10 x 7.6 x 2.9 cm.
Main crystal: 3 mm rad. aggr.

Coll. Marcus J. Origlieri.
Type Locality

Globular aggregate of good size of smithsonite crystals. Very brilliant, translucent and with some goethite as a matrix. From this classic Mexican mine. It belongs from the A. Trigo Collection (Mataró).

Size: 3.9 x 3.5 x 2 cm.
Found in ca. 1988.

Col. Antonio Trigo (Mataró).

Globular aggregates formed by acicular crystals of rosasite, with colours between deep green and light bluish green. Very aesthetic and disposed on a matrix of goethite. From this classic Mexican mine.

Size: 8.5 x 7 x 4.8 cm.

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

Very, very aesthetic specimen, unusual, showing two globular aggregates of smithsonite, colorless, transparent that let us see a whitish crystal aggregate core, with very curious growth. They are accompanied by small crystals of the same species in the form of globular grains. To give a touch of color and quality, several aggregates of olive green adamite crystals, visible terminal faces, bright, translucent and sprinkling the goethite matrix. It is an exceptional and rare old material from the Manchion Collection. Probably this specimen comes from the Palomas Oriente area of the mine. Pure aesthetics... With the label from Manchion Collection.

Size: 7.6 x 5.2 x 2.6 cm.
Main crystal: 17 mm. glob. aggreg.
Found in 1988.

Col. Manchion #378, 1988, Kucera.

Very esthetic specimen formed by some groups of prismatic crystals of adamite, contrasting on a matrix of goethite. The crystals have a very uniform yellow color, with transparency, with very well defined faces and edges and forming rosettes. We can also observe isolated doubly terminated crystals and some almost colorless. A pleasure under the loupe magnifying glass. Good size.

Size: 7.5 x 7.5 x 3.2 cm.
Main crystal: 20 mm aggreg.

Fluorescent under long wave UV

Very esthetic specimen formed by some groups of prismatic crystals of adamite, contrasting on a matrix of goethite. The crystals have a very uniform yellow color, with transparency, with very well defined faces and edges and forming rosettes. We can also observe isolated doubly terminated crystals and some almost colorless. A pleasure under the loupe magnifying glass. Good size.

Size: 8 x 7.5 x 4 cm.
Main crystal: 25 mm aggreg.

Fluorescent under long wave UV

Very aesthetic fan-shaped groups of transparent hemimorphite crystals, with a very good brilliance and excellent terminations. Accompanied by small aggregates of yellow greenish mimetite crystals. On a limonite matrix.

Size: 9 x 4 x 3.5 cm.
Main crystal: 14 x 4 mm
Found in ± 2004.

Col. M. Marí (Castelló).
Fluorescent under long wave UV

Group of crystals of adamite, which show a geometric color zoning from yellow to violet due to the presence of manganoan adamite, a variety of adamite rich in manganese. Thios cation gives to these specimens a violet to purple core. Very bright, defined and with transparence that allows us to see this species. Nice and aesthetic specimen.

Size: 6.5 x 4.5 x 3.5 cm.
Main crystal: 7 x 2 mm.

Classic locality

Group of crystals of adamite, which show a geometric color zoning from yellow to violet due to the presence of manganoan adamite, a variety of adamite rich in manganese. Thios cation gives to these specimens a violet to purple core. Very bright, defined and with transparence that allows us to see this species. Nice and aesthetic specimen.

Size: 5.5 x 4.5 x 2.5 cm.
Main crystal: 8 x 2 mm.

Classic locality

Gemmy and lustrous sprays of rich yellow legrandite needles, aesthetically jackstrawed in the vug, contrasting with the gossan matrix. Good color and fanshaped transparent and defined crystals.

Size: 6.8 x 4.5 x 4.4 cm.
Main crystal: 15 x 11 mm aggreg.
Found in 2017

Classic locality

This specimen of legrandite shows us a group of sharp crystals of this rare zinc arsenate, with an intense orange-yellow color. It is common that some crystals appears fractured, but in this sample there are several perfect prismatic crystals, undamaged, brilliant and with an incredible transparence. I personally like isolated crystals and this piece is one of them. Good size, brightness and aesthetics, very representative for the species. Accompanied by elongated smithsonite white crystals.

Size: 7 x 4 x 3.5 cm.
Main crystal: 4 mm.
Found in 2017

Classic locality

Very aesthetic specimen formed by acicular globular aggregates and fan-shaped aurichalcite crystals, with an intense blue color. They are filling the cavities of the limonite matrix with a intense contrast. With an old label from this ancient natural science store located in the center of the city of Barcelona.

Size: 7.8 x 3.5 x 3.5 cm.

Col. J.M. Manchion, Barcelona.

This is a esthetic and good size hydrozincite specimen, very rich from Ojuela mine. Quite attractive, with little snowy balls formed by several crystals of the mineral have formed in shallow recesses in a contrasting matrix of limonite. Really nice under loupe... Hydrozincite forms in the oxidation zones of zinc deposits as masses or crusts. Excol. Hubin (B).

Size: 5 x 5 x 4 cm
Main crystal: 4 mm agreg.

Excol. Hubin (Neupré, Belgique)
Fluorescent under short wave UV

Aesthetic group of prismatic crystals of adamite, with good transparence and intense color. Crystals forming sheaves and isolated, defined. They are disposed on a matrix of goethite, with cavities partially covered by small globular aggregates of yellow tsumcorite-brackebuschite.

Size: 10.8 x 8.5 x 6.5 cm.
Main crystal: 15 x 2 mm.

Rich group of very elongated mimetite crystals, some of them doubly terminated, brilliant, translucent and with a soft yellow tone. Mimetite specimens with this shape are unusual in Ojuela mine, usually globular. They are accompanied by aggregates of tiny yellow to orange crystals of tsumcorite-arsenbrackebuschite. They are disposed in a cavity of the goethite matrix. The specimen has been analyzed and the results will be sent to the buyer. It has been published in the mineral magazine "Paragénesis" (1-2017).

Size: 7.0 x 5.5 x 5.0 cm.
Main crystal: 20 x 2 mm.

Analyzed specimen with report

Exceptional specimen formed by several groups of prismatic crystals of adamite, which are disposed forming rosettes on a matrix of goethite. Crystals have a very uniform yellow color, with transparence, and very defined faces and edges. Pure aesthetic.

Size: 7.5 x 6.4 x 2.5 cm.
Main crystal: 6 mm.

Superb adamite crystal, vey brilliant, yellow color, curved faces and showing terminal facets on both ends. It is disposed in a very esthetic form on a matrix of goethite. Good size and quality.

Size: 5.3 x 2.7 x 2.5 cm.
Main crystal: 22 x 10 mm.

Fluorescent under LW-UV and SW-UV lights

A very rich group of mimetite globular aggregates, with yellow tone and brilliant. Acompanied by hemimorphite lanceolated crystals of hemimorphite, transparence and brilliance.

Size: 8.8 x 7.3 x 4.8 cm.

A rich group of doubly terminated crystals of wulfenite showing prismatic growth truncated by the terminal pinacoid. They show an intense orange to yellow color and are disposed on a matrix of limonite partially covered by olive green mottramite. A good size specimen and very aesthetic.

Size: 10.0 x 9.8 x 5.5 cm.
Main crystal: 8 x 3 mm.