Rosell Minerales

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

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.

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.

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.

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.

Small but interesting specimen of curite that presents groups of brilliant acicular prismatic crystals with an intense orange color. Observed under the microscope we can see that they have transparency and are accompanied by yellow crystals soddyita. This radioactive mineral is named after Pierre Curie (see wikipedia) and this sample is from Shinkolobwe, the type locality for the species. A chance to get a piece with curite crystals.

Size: 3,5 x 2,5 x 1,8 cm.
Main crystal: 0,3 mm.

Presents radioactive activity.

A very brilliant crystallized primary malachite. The prismatic needle like crystals present diverging and fan-shaped groups and have an excellent luster. Good transparence. Color is very intense and characteristic with some zoning. A very representative specimen and from a classic Katanga mining area.

Size: 7,0 x 5,4 x 4,6 cm.
Main crystal: 18 mm.
Found in 2013.

A very brilliant crystallized primary malachite. The prismatic needle like crystals present diverging and fan-shaped groups and have an excellent luster. Good transparence. Color is very intense and characteristic with some zoning. A very representative specimen and from a classic Katanga mining area.

Found in 2013.

A very brilliant and huge size crystallized primary malachite. The prismatic needle like crystals present diverging and fan-shaped groups and have an excellent luster. Color is very intense and characteristic with some zoning. With some matrix included in malachite. A very representative specimen and from a classic Katanga mining area.

Size: 11,3 x 6,5 x 6,0 cm
Main crystal: 13 mm (aggr)
Found in 2013.

These specimens of brochantite from the mining area of Katanga are one of my weaknesses. The long needles of this mineral, filling cavities of the matrix, special green color, brilliance and silky luster... Pure aesthetic. I hope you enjoy it.

Size: 6.9 x 6.6 x 4.7 cm.
Main crystal: 12 mm.

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

A huge size specimen of acicular malachite forming fan-shaped aggregates. Excellent and characteristic green color and superb brilliance. It shows a vug layered by needle crystal terminations those give an even darker green. With some rocky matrix.

Size: 11,3 x 6,4 x 5,7 cm.

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.

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.

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

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

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.

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.

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.

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.

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.