Rosell Minerales

Exceptional specimen of kolwezite, which occurs as globular aggregates of olive-green crystals, partially covered by a yellowish earthy patina. They are disposed on a matrix of pink crystals of cobaltoan calcite. An exceptional sample for the species. We have analyzed it to check the content of Co. The average of various analyzes indicates a Co: Cu ratio of 1: 2.3-2.6, consistent with some results from other specimens with 1: 2 ratios. Various black aggregates appear in the sample, sometimes partially covering kolwezite, which corresponds to heterogenite. Also with small malachite crystals.

Size: 9.8 x 7.5 x 6.2 cm.

Colourful specimen of cobaltoan dolomite, with intense color, brilliance and translucent crystals. Very aesthetic. From the J. Astor collection (Barcelona).

Size: 4.1 x 2.6 x 2.4 cm.
Found in ca. 1987.

Col. J. Astor (Barcelona).

Analyzed crystal of lueshite, from the Type Locality. Lueshite is a rare sodium niobate. These samples came out only sporadically, and mostly 20-plus years ago. In this specimen it shows the presence of Ca and Ti, probably minor fersmite. Analysis will be sent to the buyer.

Size: 0.9 x 0.5 x 0.5 cm.

Type Locality

Aggregates of metatyuyamunite crystals, with an intense yellow to orange colour, accompanied by malachite radial agregates and yellow laminar carnotite.

Size: 7.3 x 3.3 x 3.3 cm.

Presents radioactive activity.

Very aesthetic specimen formed by several botryoidal aggregates of chrysocolla, with bluish green tones and very brilliant, peppered by prismatic crystals of malachite, transparent, bright and forming sheaves, which are accompanied by botroidal aggregates of intense black colour of heterogenite. A different piece of this classic mine.

Size: 9.0 x 8.8 x 3.5 cm.
Found in 2003.

In my opinion, among all known radioactive minerals, kasolite is the most aesthetic. It presents forms of elongated to tabular prisms, very well defined and sharp, many of them doubly terminated and of intense yellow color, even with some transparency. It is accompanied by guilleminite crystals of yellowish color. The matrix is partially covered by brilliant malachite. A aesthetic sample from a classic locality, to be observed with attention.

Size: 6.5 x 4.5 x 4 cm.
Main crystal: 1.5 mm

Excol. F. Coune (Belgium).
Presents radioactive activity.

Very aesthetic specimen that shows various globular aggregates of malachite, velvety and green color with zoning. Peppered by small malachite crystals, under the magnifying glass we can see that they are small transparent and defined crystals. In a matrix with goethite. From this classic Congolese locality for the species.

Size: 8.8 x 6.8 5.4 cm.

Classic locality

Very aesthetic specimen that shows various globular aggregates of malachite, velvety and green color with zoning. Peppered by small malachite crystals, under the magnifying glass we can see that they are small transparent and defined crystals. In a matrix with chrysocolla. From this classic Congolese locality for the species.

Size: 9.8 x 7.3 x 4 cm.

Classic locality

Very aesthetic botryoidal aggregates of malachite, with intense green color and brilliance. From this classic Congolese town for the species.

Size: 9.7 x 8.5 x 5.5 cm.

Classic locality

Very aesthetic specimen that shows globular aggregates of malachite, very bright and intense green. Also as velvety botryoidal aggregates. If you take a look under the magnifying glass, you will see that they are formed by several small crystals of this copper carbonate, transparent and defined. From this classic Congolese locality for the species.

Size: 10.5 x 7 x 5.4 cm.

Classic locality

Very aesthetic specimen that shows globular aggregates of malachite, very bright and intense green. If you take a look under the magnifying glass, you will see that they are formed by several small crystals of this copper carbonate, transparent and defined. From this classic Congolese locality for the species.

Size: 6.8 x 5.7 x 4.5 cm.

Classic locality

Very aesthetic stalactite of malachite, with an intense green color and a very aerial layout. Good size. From this classic Congolese locality for the species.

Size: 9.5 x 2.8 x 2.7 cm.

Classic locality

Rich aggregate of malachite crystals, brilliant, with an intense green color, which stand out on a matrix of blue-green chrysocolla. Very aesthetic

Size: 7.4 x 5.5 x 4.5 cm.

Kasolite is one of my favorite species. In this sample (from Dr. Viñals, Barcelona) we can enjoy several vugs with lanceolated kasolite crystals. With the orange color, some transparent and isolated, some forming aggregates. Contarsting on the green matrix.

Size: 4.1 x 3.7 x 3.5 cm.

Presents radioactive activity.

Very rich curite specimen, with some intense orange color crystals and the rest black due to being coated by heterogenite. The sample comes from the former Coune collection and according to its owner was adquired from the 90s, but specimen could be older. Curite crystals are disposed in a very contrasted way on the white matrix. From the type locality for the species.

Size: 5 x 3.5 x 3 cm.

Localidad Tipo - Type Locality
Presents radioactive activity.

Heterogeneite specimens of Kabolela are among the most appreciated by systematic mineral collectors. This piece shows a botryoidal aggregate, of which we consider HCoO2 formula, according to the latest studies on the species. Intense black color, brilliance, waxy luster... A classic and very aesthetic definitive specimen.

Size: 6.7 x 4 x 2.8 cm.
Found in ±1960

Group of very well defined cuprite crystals showing very unusual facets both for the species and for this classic locality for the species. They have very well defined faces of the cube and the octahedron, together with those of the dodecahedron. Under intense light the red transparency is observed, but the surface shows a gray patina, the years have passed away. They are placed on a cavity of brilliant calcite crystals. An interesting rarity.

Size: 7.3 x 5.5 x 4.2 cm.
Main crystal: 9 x 5 mm.
Found in ca. 1980.

Col. Jordi Povill (Olesa de M.) No. 544

Really nice botryoidal aggregates of malachite, with intense color and a velvety surface due to the small crystals forming globular aggregates. Very different specimen from this mine, well known for the type locality of cornetite species. All aesthetics.

Size: 8.0 x 7.4 x 4.5 cm.
Main crystal: 11 x 10 mm.

In my opinion, among all known radioactive minerals, kasolite is the most aesthetic. It presents forms of elongated to tabular prisms, very well defined and sharp, many of them doubly terminated and of intense yellow color, even with some transparency. It is accompanied by wulfenite crystals of orange color. The matrix is partially covered by brilliant and transparent torbernite thin tabular crystals. With some malachite. A aesthetic sample from a classic locality, to be observed with attention, nowadays it is very difficult to see good samples like these.

Size: 3.8 x 2.8 x2.5 cm.
Main crystal: 1.5 mm

Excol. F. Coune (Belgium).
Presents radioactive activity.

In my opinion, among all known radioactive minerals, kasolite is the most aesthetic. It presents forms of elongated to tabular prisms, very well defined and sharp, many of them doubly terminated and of intense yellow color, even with some transparency. It is accompanied by wulfenite crystals of orange color. The matrix is partially covered by brilliant and transparent torbernite thin tabular crystals. With some malachite. A aesthetic sample from a classic locality, to be observed with attention, nowadays it is very difficult to see good samples like these.

Size: 4.0 x 3.6 x 2.8 cm.
Main crystal: 2 mm

Excol. F. Coune (Belgium).
Presents radioactive activity.

Very aesthetic group of sklodowskite crystals, showing a very sharp prismatic crystals, with transparence and intense yellow color. Old and really good specimen from col. Coune (B) collection, found in 1960's. This species is named by Marie Skłodowska-Curie.

Size: 5.8 x 5.4 xd 3.6 cm.

Excol. F. Coune (Belgium).
Presents radioactive activity.

These cuprite crystals from Kolwezi mines are a classic of worldwide mineralogy. In this specimen the crystal shows defined faces and edges, with intense red color under the light. It is disposed in a cavity with needle malachite crystal aggregates. Crystal has no damage, the back side shows natural rounded forms. A very aesthetic and difficult to see specimen.

Size: 7.2 x 5.2 x 4.7 cm.
Main crystal: 12 x 7 mm.

Classic locality

The kamotoite-(Y) are the intense yellow crystalline sprays, with individual flat-laying crystals to 5 mm. brilliant and transperent. In the same sample we can observe probably a small vein of yellow to orange brilliant uranophane. Kamoto is the Type Locality for the species. A very rare uranium and ytrium mineral from Katanga.

Size: 2.5 x 2.3 x 2.0 cm.
Main crystal: 5 mm.

Mineral analizado - Analyzed specimen
Presents radioactive activity.

Unusual specimen formed by globular aggregates of pseudomalachite, intense green color, which are disposed on matrix covered by well defined transparent crystals of willemite, with a yellow to colorless color. It is accompanied by rosasite aggregates of bluish green color. Very aesthetic. We have analized rosasite and willemite and we will send results to the buyer.

Size: 9.2 x 6.5 x 4.8 cm.
Main crystal: 4 x 4 mm.

Ex-col. F. Coune.
Fluorescent under short wave UV

Group of very sharp carrollite crystals showing cube forms more developed than the octahedron ones. Very bright and interpenetrating each other. Exceptional metallic luster. Highlights this specimen by small sharp and twinned crystals of chalcocite which are disposed on the carrolite faces. An unusual and very aesthetic combination.

Size: 5.0 x 4.0 x 2.4 cm.
Main crystal: 15 x 12 mm.
Found in 2001.