Rosell Minerales

Gem quality allanite-(Ce) specimen, with a good size, elongated and showing well defined faces and edges. It is embedded in the matrix of calcite with brilliant talc. Transparency and luster are excellent and shows a zoning toasted honey color, with green pleochroism visible depending on light. It is accompanied by other smaller crystal similarly defined and transparent. The area where I extracted no longer exists, when quarry has been extended. A piece of Rare Earths (REE) of a classic French locality, aesthetic and not easy to be found nowadays.

Size: 5,5 x 4,0 x 2,8 cm.
Main crystal: 15 x 3 mm.
Found in 2006.

It shows Pleochroism

This is a nice spinel crystal from Katukubura, very rare to find in the market. This sample shows a very brilliant crystal of spinel, incredibly defined, with very marked octahedron shape. In a matrix of calcite. These crystals are known in gemmological context as "ceylonite". From a not well represented mining area.

Size: 5,3 x 4,5 x 3,6 cm.
Main crystal: 12 x 9 mm.

Group of very sharp quartz crystals with inclusions of clinochore, with transparence, luster and aesthetically disposed on a K-feldspar (adularia) crystals as a matrix. Accompanied by well defined small titanite crystals with a honey tones.

Size: 4,5 x 3,7 x 3,0 cm.
Main crystal: 28 x 5 mm.
Found in 2011.

Rich group of andradite crystals showing trapezohedron forms, with the curiosity that the edges are marked with a brown line tone, and with orange faces. Showing some translucency on edges. A specimen rather than representative for this classic Greek mining area.

Size: 5,4 x 5,0 x 3,5 cm.
Main crystal: 12 x 10 mm.

Calcite specimens from la Florida mines are known and valued worldwide. In this sample we have a complex twinned escalenohedron, "doubly terminated", with combination with the rhombohedron. Transparence is excellent, with defined striated faces and delicate edges. It has a delicate yellow color.
These specimens appeared accompanied by dolomite, at level 6 of this mine. A huge size and excellent specimen from this classic Spanish locality.

 

Size: 10,7 x 7,4 x 4,6 cm.
Main crystal: 6,0 x 3,4 cm.

On a matrix covered by small quartz crystals, very bright, you have different groups of erythite crystals with a good size, showing the flattened prismatic shapes and intense color, typical for the species. A sample of quality and good size.

Size: 10,0 x 7,5 x 2,2 cm.
Main crystal: 33 x 17 mm.

Excellent specimen formed by several groups of transparent tabular barite crystals forming globular aggregates, with transparence, brilliance and very sharp faces and edges. Very aesthetically disposed on a fluorite cubic crystals matrix with yellow color and transparence. Accompanied by dolomite saddle-shaped crystals and chalcopyrite. A Spanish classic of the best quality.

Size: 8,8 x 5,5 x 4,0 cm.
Main crystal: 14 x 12 mm. (aggr.)

A very rich group of cuprian adamite pseudooctahedral crystals. Well defined faces and edges, excellent brilliance and a green color with bluish tones. Disposed covering a vug on the limonite matrix. Just this specimen was published in mindat and labelled as cuprian austinite, but further analysis indicate that they were cuprian adamite. An excellent specimen.

Size: 8,5 x 4,7 x 3,5 cm.
Main crystal: 2 x 2 mm.
Found in 2008.

Excellent and rich group of prismatic zinkenite crystals, some of them with a good size, with striated faces, with a huge size chalcocite crystal with planar to curved terminal faces. Good metallic luster and well disposed on a vug with lenticular siderite crystals. Usually they occurs covered by calcite. A hig quality specimen from this species and locality.

Size: 5,7 x 5,2 x 4,0 cm.
Main crystal: 9 x 4 mm.

On a matrix covered by small dolomite and some calcite crystals is disposed in a very aerial shape a huge size calcite crystal. It shows well defined faces and edges and the rotation twin. It is not a doubly terminated crystal, it is a 180º twinned crystals. Complete and no damage. With a tastefull silky luster and translucent. A delicate yellowish tone increases its aesthetics on the white matrix. It is not common see these specimens from this classic Spanish mine.

Size: 7,8 x 4,9 x 3,6 cm.
Main crystal: 6,0 x 2,7 cm.
Found in 09/2001.

Group of very sharp fluorite crystals showing cubic forms and trapezohedron faces on some vertexs. Well defined faces and edges, transparent to translucent. Yellow color is uniforms, with curious internal colorless structures, and some siderite crystals on them. A huge size specimen from this French mine.

Size: 9,5 x 8,5 x 4,0 cm.
Main crystal: 4,4 x 3,3 cm.

Fluorescent under long wave UV

A group of fluorite crystals those, at first glance, seem just octahedra, but if you take a look carefully you will see complex terminations. Some crystals are isolated increasing its aesthetics. Good transparence and exceptional green color. Acompanied by small quartz crystals.
This specimen belongs to the "old" fluorites from Berta quarry, from an area of ​​sericitized granodiorite. In the fractures, if it was enough space, they grew lining the walls. When quarry worked lower levels fluorite appeared in fresh granite matrix, but mostly without this depth of color. A great speciemen. A classic between classics of our country.

Size: 13,2 x 9,0 x 5,5 cm.
Main crystal: 11 x 10 mm.
Found in 1980's.

Fluorescent under LW-UV and SW-UV lights

A classic between classics of our country. This is a druse of fluorite crystals those, at first glance, seem just octahedra, but if you take a look carefully you will see vertices truncated by cube. Some crystals show parallel growth and other are interpenetrated. Good transparence and exceptional green color. Acompanied by small quartz crystals.
This specimen belongs to the "old" fluorites from Berta quarry, from an area of ​​sericitized granodiorite. In the fractures, if it was enough space, they grew lining the walls. When quarry worked lower levels fluorite appeared in fresh granite matrix, but mostly without this depth of color. A great specimen.

Size: 7,5 x 5,6 x 3,4 cm.
Main crystal: 9 x 9 mm.
Found in 1980's.

Fluorescent under LW-UV and SW-UV lights

A very rich mottramite specimen formed by a layer of minute crystals, very brilliant and with a deep olive green color, near to black on druses, visible only in isolated crystals. A really representative specimen from a classic Spanish gold mines locality.

Size: 7,3 x 6,5 x 3,8 cm.

Ex-col. C. Rewitzer.

Fantastic cuprosklodowskite specimen formed by several thin acicular prismatic crystals with a brilliant green to yellow color, very brilliant and transparent. Crystals have grown in cavities covered by dark green malachite. In one of them we can enjoy a great aesthetic group of tabular barite crystals, with toasted honey color and transparent, on which a beautiful acicular aggregate of cuprosklodowskite has grown. A small beauty.
This speciemn of uranyl and copper silicate is from Musonoi, not Kalongwe. A complete sample.

Size: 7,5 x 6,0 x 4,5 cm.
Main crystal: 8 mm.

Ex-col. Joan Rosell.

Rosettes of sharp hexagonal tabular autunite crystals, interpenetrated between them and some isolated. The intense yellow color is characteristic of the species. Crystals are disposed on a pegmatite matrix. This is a sample extracted from Vénachat area late 70's and comes from a reduced extension pegmatite field embedded in granite, near Compreignac. Traces of workings from the 19th century can be found, beside an open pit worked for uranium by COGEMA in 1982-1987. A good quality French historical specimen.

Size: 6,5 x 3,8 x 3,2 cm.
Main crystal: 2 x 2 mm.
Found in 1970's.

Precio reducido-Reduced price 50€
Fluorescent under long wave UV

Group of two apophyllite-(KF) crystals showing perfect tetragonal prism faces, well developed, with the dipyramid and pinacoid. The edges are very sharp and the faces have some striation. Translucent and slightly green color zoning, more intense in the crystal core. Faces are peppered by small white calcite crystals that have grown mostly in some orientated faces, probably due to water circulation. It is a very aesthetic miniature. On a matrix of very brilliant crystals of stilbite.

These specimens were found in 2006 in a small Indian village, when they were drilling a water well. They found a cavity totally covered with them. There is an interesting article in the Mineralogical Record magazine (39:267-273).

Size: 4,5 x 3,5 x 2,5 cm.
Main crystal: 22 x 12 mm.
Found in 03-06/2007.

Excellent doubly terminated crystal of apophyllite-(KF) showing perfect tetragonal prism faces, well developed, with the dipyramid and pinacoid. The edges are very sharp and the faces have some striation. Translucent and slightly green color zoning, more intense in the crystal core. Faces are peppered by small white calcite crystals that have grown curiously mostly in some orientated faces, probably due to water circulation. It is very, very aesthetic. On a matrix of very bright and transparent crystals of stilbite also peppered by small calcite rhombohedra.

These specimens were found in 2006 in a small Indian village, when they were drilling a water well. They found a cavity totally covered with them. There is an interesting article in the Mineralogical Record magazine (39:267-273).

Size: 7,0 x 4,5 x 4,3 cm.
Main crystal: 40 x 10 mm.
Found in 03-06/2007.

Precio reducido-Reduced price 80€

Tabular celestite crystal with a good size and very defined faces and edges. Very aerial disposed on the matrix. Excellent transparence and brilliance. During many years these crystals were characterized as barite, but later studies showed that they were celestite. From a classic Spanish mine.

Size: 5,7 x 4,0 x 2,3 cm.
Main crystal: 23 x 17 mm.

Groups of sharp marcasite crystals, very brilliant, showing the classic forms of "cockscomb". Very stable, defined and partially covering a matrix of small crystals of sphalerite. This matrix presents the known "schalenblende". It is formed by compact sphalerite and wurtzite masses of a pale brown colour, occurring in concentric layers with reniform surfaces which also may contain pyrite and galena. It is believed to have formed by crystallization of a rich-sulfide colloidal dispersion. Good size and aesthetic specimen.

Size: 10,0 x 6,4 x 4,0 cm.
Main crystal: 3 x 3 mm.
Found in 2010.

Precio reducido-Reduced price 65€

Curious aggregate of sphalerite crystals formed by several crystals of this sulfur, good brilliance, with sharp faces and edges and some transparence. Very aesthetically disposed on a matrix of white rhombohedral dolomite crystals. From a former German collection. Different than usual.

Size: 10,5 x 9, 8 x 4,0 cm.
Main crystal: 9 x 2 cm. (aggr.)

German col. / Núm. de colección 585.

Groups of very sharp magnetite crystals showing octahedral forms with staggered epitaxial growths on faces. Intense metallic luster, color is deep black and very sharp faces and edges. It is accompanied by green epidote crystals, brilliant and transparent; prismatic crystals of diopside (more grayish green tone), andradite and some clinochlore. A complete gemmy specimen.

Size: 6,0 x 3,9 x 2,4 cm.
Main crystal: 8 x 7 mm.
Found in 2011.

Brilliant and sharp azurite crystals that have growth in separate vugs, with prismatic forms and defined terminal faces. With good color, luster and some transparency, one of them is partly substituted by malachite. Disposed in two cavities of this hard rocky matrix.
In Kerrouchen, a classic Moroccan mineral locality, each miner has his own "hole" and get its samples. There are several mines aligned on a particular stratigraphic level, with low gallery development. Miners obtain the specimens by hammering, so obtaining them in matrix it is not easy.

Size: 7,5 x 6,0 x 4,5 cm.
Main crystal: 11 x 10 mm.
Found in 02/2013.

Brilliant and sharp azurite crystal with prismatic forms and defined terminal faces. With good color, luster and some transparency, which is partly substituted by malachite. Disposed in a cavity of the rocky matrix.
In Kerrouchen, a classic Moroccan mineral locality, each miner has his own "hole" and get its samples. There are several mines aligned on a particular stratigraphic level, with low gallery development. Miners obtain the specimens by hammering, so obtaining them in matrix it is not easy.

Size: 8,0 x 6,8 x 3,6 cm.
Main crystal: 13 x 10 mm.
Found in 02/2013.

Brilliant and sharp azurite crystal with prismatic forms and defined terminal faces. With good color, luster and some transparency, which is partly substituted by malachite. Disposed in a cavity of the rocky matrix. It is accompanied by another crystal, also partially pseudomorphed, having a fracture due to the contact with the enclosing matrix.
In Kerrouchen, a classic Moroccan mineral locality, each miner has his own "hole" and get its samples. This one was estracted in our visit in February 2013.

Size: 6,5 x 4,4 x 4,0 cm.
Main crystal: 16 x 8 mm.
Found in 02/2013.