Rosell Minerales

Group of tabular chalcocite crystals, well defined and with polysynthetic growths on faces. Some present fractures where we can observe the metallic luster of the species. Specimens from this mine are rare on the market. It belongs from the former René Hubin collection (Neupré, Belgium) and is accompanied by the label. Nice miniature.

Size: 3 x 2.9 x 1.8 cm.
Main crystal: 1.1 cm.

Col. R. Hubin (Belgique).

Globular aggregates of kolwezite, light to intense green in color. They contrast on a matrix with cobalt-bearing calcite crystals.

Size: 4.6 x 3.9 x 3.8 cm.
Found in ±2010.

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).

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.

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.

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.

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

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.

The kamotoite-(Y) are the intense yellow crystalline sprays, with individual flat-laying crystals to 5 mm. 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: 4,4 x 2,0 x 1,8 cm.

Presents radioactive activity.

On a compact quartz matrix we have different groups of cobaltoan calcite crystals with intense purple to fuchsia color, with transparence and well defined faces and edges. It is accompanied by spherical aggregates of snowy white dolomite and some quartz crystals. A classic from Katanga Copper Crescent mines.

Size: 5,4 x 4,3 x 4,9 cm.
Main crystal: 6 x 2 mm.

This specimen shows spherical aggregates of plancheite, formed by several acicular crystals in a radiated shape. On the surface of the spheres we can enjoy curious honeycomb structures. Color is between blue and blue-gray. On a vug layered by small quartz crystals. From a locality not well represented in collections for this species.

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

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.