Rosell Minerales

Malachite stalactite with a very, very curious shape. Smooth on one side, with brilliant microcrystals of the same mineral. On the other side, it presents an elongated cavity formed by various growths. Floater, good size and quality.

Size: 14.5 x 3.9 x 3.6 cm.

Stalactitic malachite growths, with an intense color, brilliant, velvety and disposed aerially on the matrix.

Size: 12.2 x 6 x 5.2 cm.
Main crystal: 3.8 cm stal.

Stalactitic malachite growths, with an intense color, brilliant, velvety and disposed aerially on the matrix.

Size: 11 x 7.7 x 4.4 cm.
Main crystal: 3.9 cm. stal.

Aesthetic stalactitic aggregates of malachite, with brilliance and uniform green color. Very aesthetic.

Size: 12 x 11 x 8.5 cm.

Malachite specimens from this Upper Katanga mine are notable for radial aggregates of fine crystals that, taken together, have a velvety appearance and excellent brilliance. Intense green colour, good size and fine aesthetics.

Size: 11 x 8.7 x 3.3 cm.

Malachite specimens from this Upper Katanga mine are notable for radial aggregates of fine crystals that, taken together, have a velvety appearance and excellent brilliance. Intense green colour, good size and fine aesthetics.

 

Size: 10.4 x 8.2 x 5 cm.

Malachite specimens from this Upper Katanga mine are notable for radial aggregates of fine crystals that, taken together, have a velvety appearance and excellent brilliance. Intense green colour, good size and fine aesthetics.

Size: 7.9 x 7.6 x 3.8 cm.

Malachite specimens from this Upper Katanga mine are notable for radial aggregates of fine crystals that, taken together, have a velvety appearance and excellent brilliance. Intense green colour, good size and fine aesthetics.

Size: 9.1 x 8.6 x 4.2 cm.

These specimens of malachite present mamelonar, botryoidal to stalactic growths, with a very intense characteristic green color and silky luster. If they are observed under magnification, they show us that the sparkly green is produced by small malachite crystals that cover the surface. The photograph does not reflect all the splendor and brilliance of the piece. They are disposed on a fibrous malachite matrix. Very aesthetic.

Size: 11 x 8.5 x 4.2 cm.

These specimens of malachite present mamelonar, botryoidal to stalactic growths, with a very intense characteristic green color and silky luster. If they are observed under magnification, they show us that the sparkly green is produced by small malachite crystals that cover the surface. The photograph does not reflect all the splendor and brilliance of the piece. They are disposed on a fibrous malachite matrix. Very aesthetic.

Size: 6.2 x 6.6 x 3.5 cm.

These specimens of malachite present mamelonar, botryoidal to stalactic growths, with a very intense characteristic green color and silky luster. If they are observed under magnification, they show us that the sparkly green is produced by small malachite crystals that cover the surface. The photograph does not reflect all the splendor and brilliance of the piece. They are disposed on a fibrous malachite matrix. Very aesthetic.

Size: 5.9 x 5.5 x 3.6 cm.

These specimens of malachite present mamelonar, botryoidal to stalactic growths, with a very intense characteristic green color and silky luster. If they are observed under magnification, they show us that the sparkly green is produced by small malachite crystals that cover the surface. The photograph does not reflect all the splendor and brilliance of the piece. They are disposed on a fibrous malachite matrix. Very aesthetic.

Size: 9.2 x 6.5 x 6.2 cm.

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.

Very aesthetic specimen that shows various globular and stalactitic 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: 10.5 x 5.6 x 4.5 cm.

Classic locality

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