Druse of tabular wulfenite crystals, transparent, well defined and with a soft yellowish to greenish hue. They are accompanied, on a goethite matrix, with sheaf aggregates of mimetite crystals. Very aesthetic.

Size: 8.2 x 4.5 x 3 cm.

Classic locality

Quartz specimen with marked "window" growths with inclusions. These Allos pass crystals are not very common on the market. Allos pass is situated on the edge of Mercantour National Park approximately 20 km from the small village of Barcelonnette.

Size: 8.5 x 6.3 x 3 cm.

Blocky aerinite criptocristalline with fragments of dolerite included. Aerinite was used as a blue pigment in many Romanesque paintings in the Pyrenees between the 11th and 14th centuries. Its characteristic blue color varies from dark to pale blue. In fact, its name comes from a Greek root aerinos meaning "atmosphere" or "sky", as it was only known by that color.

Size: 6.5 x 5 x 3.7 cm.

Group of cyclically twinned bournonite crystals, with a metallic gray color, interpenetrating each other. They are disposed on a matrix of very brilliant octahedral pyrite, partially covered by complex sphalerite crystals.

Size: 6 x 4.5 x 3.8 cm.

Group of octahedral pyrite crystals, very brilliant and well defined, which are accompanied by complex crystals of sphalerite. On them we observed numerous white globular crandallite aggregates (analyzed by XRD). This combination of minerals is unusual in the deposit, with this phosphate being the first citation.

Size: 5.5 x 5.3 x 2.7 cm.

Group of octahedral pyrite crystals, very brilliant and well defined, which are accompanied by complex crystals of sphalerite. On them we observed numerous white globular crandallite aggregates (analyzed by XRD). This combination of minerals is unusual in the deposit, with this phosphate being the first citation.

Size: 8.4 x 6.9 x 5 cm.
Main crystal: 18 mm. py

Druse of pyrite crystals with faces of the cube and rhobododecahedron, with diploid forms, striated faces, complex crystallography, which adds interest to the specimen. The luster is exceptional, not easy to take photos. The crystals are interpenetrated. A classic from the mine from which the bases for the FIFA football award "Ballon d'Or" are obtained...

Size: 9.2 x 6.8 x 4.6 cm.

Compact mass of purple chromian iowaite with minor inclusions of greenish-brown serpentine. Iowaite is one of the former minerals on the locality and mostly replaced by stichtite, which forms a similar aggregates but is more light, lilac coloured.

Size: 7.6 x 4 x 2.7 cm.

Rich specimen showing wire aggregates of native silver, curved, with curls, shiny and with a very aesthetic golden tone. Some have darker areas of acanthite. They are accompanied by small but well-formed hexagonal pearceite-T2ac crystals. With calcite matriz. This piece is surprising when looking at the cavities under magnification. It berlongs from the Sarbaiskoe deposit, the best known silver producing area in Kazakhstan. Very rare to find specimens from this locality.

Size: 5 x 4.8 x 3.1 cm.
Found in ±1990.

Good size and rich aggregate of andradite-grosularia crystals with an intense brown color on the surface, but with color zoning, clearer inside. The exterior of the sample shows a dark reddish-brown tone with very well defined trapezohedral crystals, but inside the crystals have a very aesthetic golden tone. Multi-layered bands ranging from reddish brown to green to gold are shown in the fracture zones of the piece. For this reason we prefer to label it as the andradite-grossular series.

Size: 11 x 9.5 x 4.5 cm.
Main crystal: 15 mm.
Found in 2020.

A rich group of cube octahedral galena crystals, with ancient exfoliated zones and certain luster, but with the old patina we have preferred not to remove, since it is an old piece from the classic Príbram mining area. They are disposed on a matrix with pyrite and quartz crystals. With a handwritten label.

Size: 7.3 x 6.9 x 3 cm.
Main crystal: 1 cm.
Found in ±1950.

Col. H.G. Hoppert.
Classic locality

Rich group of complex and brilliant chalcopyrite crystals contrasting on a matrix of barite crystals. They are accompanied by interpenetred rhombohedral dolomite crystals. The specimen belongs from the Dreislar mine, a mine that was operated from 1970 to 2007, with the usual interruptions, for lead, zinc and copper, and more modernly for baryte. The specimens are classics in German collections.

Size: 8.8 x 5.5 x 3.4 cm.
Main crystal: 7 mm.

Classic locality

Very good sized specimen of rhodochrosite from this classic Argentine locality. In the polished part we can enjoy the characteristic bands, with good color. And the "natural" part tells us that it belongs from a vein. It has a handwritten label attached on the sample and due to its appearance it was a very old piece.

Size: 9.5 x 6 c 4.5 cm
Found in ±1950.

Classic locality

Aesthetic specimen of opal with notable bluish iridescences in a very fine-grained sandstone matrix. From Quilpie area, a locality with an economy based on the grazing and mining industries. The area has one of the largest deposits of boulder opal in the world. A gem...

Size: 7.8 x 6.2 x 2.7 cm.

Col. H.G. Hoppert.

Very aesthetic specimen that shows two generations of orpiment. One with an intense orange color, formed by numerous brilliant crystals. A second generation formed by crystals that cover the arsenopyrite-pyrite matrix, with a darker tone. A different sample from this classic Peruvian mine.

Size: 8 x 6.3 x 3.8 cm.

A good size crystal of columbite-(Mn) that shows parallel growths on the faces, with striations, intense luster and black color. The accompanying handwritten label indicates that it belongs from the Etiro pegmatites, in Namíbia, a locality of which few specimens have been seen in the market. The piece belongss from H.G. Hoppert. Sample has been analyzed and the results, as can be seen in the attached documents, indicate it contains more Mn than Fe, a columbite, but with values of Nb-Ta in the border area with tantalite domain. All results will be sent to the buyer.

Size: 4.8 x 3.8 x 1.7 cm.
Found in ±1970.

Col. H.G. Hoppert.
Analyzed specimen with report

Floater crystal of columbite-(Fe), with a huge size for the species. We can observe numerous facets, some with striations, with brilliance. The specimen indicates "repaired" since a part (see photo) has been repositioned in its place, without affecting the quality. It is accompanied by minor lepidolite. Columbite specimens of this size are not common. We have analyzed the specimen and, in the attached diagram, we can see the results which indicate sample is in the columbite-(Fe) domain. Minor traces of Ti are present. We will send this results to the buyer. An exceptional piece.

Size: 8.6 x 6.2 x 3.5 cm.
Found in ±1970.

Col. F. Schweiger (Wien).
Analyzed specimen with report

A typical polished slice of 'Federpyrit' (variety "feather pyrite"), with a good size. This is a pseudomorphs of pyrite after thin tabular pyrrhotite. Classic specimen from Pfaffenberg, an ancient German lead-silver mine. With siderite. Very appreciated for European collectors.

Size: 12.2 x 6.3 x 2.6 cm.
Found in ±1970.

Col. H.G. Hoppert.

A very interesting specimen of sphalerite that shows a very aesthetic cyclic twin, unusual for the species and for this classic mine. Very brlliant, with galena crystals on matrix.

Size: 6.2 x 4.9 x 2.8 cm.
Main crystal: 3 cm.
Found in ±1980.

Col. F. Schweiger (Wien).
Classic locality

Specimen of native silver from this more than classic Mexican locality such as Batopilas. This specimen shows numerous herringbone-patterned, arborescent and skeletal silver aggregates formed by crystals spinel-twin, very elegant and with luster and colour. They are disposed aerially on a matrix with calcite. Finding specimens of this quality and size (and price) from this mine is not easy at all. It belongs from a former Austrian collection.

Size: 4.6 x 4.4 x 3.1 cm.
Main crystal: 32 mm.
Found in ±1960.

Col. F. Schweiger (Wien).
Classic locality

An excellent old classic from the American mineralogy. Really sharp crystals of hübnerite forming groups of parallel growths, some of them isolated. Translucent, with the intense brown color and brilliance and an esthetic contrast with the snowy white matrix. Nowadays, it is very difficult to find specimens with this quality and size... From a former Austrian collection.

Size: 8.8 x 8.4 x 5.2 cm.
Main crystal: 35 mm.
Found in ±1970.

Col. F. Schweiger (Wien).
Classic locality

Thick and good size stibnite crystal from this classic Romanian mine. It presents an elongated prism, striated, with an excellent brightness. Very rich in facets in the upper terminal part, with complex bipyramidal faces. Accompanied by baryte cristals as minor matrix. Nowadays it is difficult to find specimens of this quality from this mine. It comes from a former Austrian collection.

Size: 7.6 x 2.3 x 1.4 cm.
Found in ±1970.

Col. F. Schweiger (Wien).
Classic locality

Very thick and good size stibnite crystal from this classic Romanian mine. It presents an elongated prism, striated, with an excellent brightness. Very rich in facets in the upper terminal part, with complex bipyramidal faces. On the main crystal we observe a group of crystals of the same mineral, finer, that suppose a second crystallization. Nowadays it is difficult to find specimens of this quality from this mine. It comes from a former Austrian collection.

Size: 6.9 x 1.7 x 1.8 cm.
Found in ±1970.

Col. F. Schweiger (Wien).

Excellent specimen from Herja mine, a world-class Romanian locality for stibnite. This piece is formed by numerous groups of divergent prismatic crystals, very brilliant and with visible terminal faces. Accompanied by small rhombohedral dolomite crystals. It belongs from a former Austrian collection.

Size: 7.4 x 6.5 x 3.5 cm.
Found in ±1980.

Col. F. Schweiger (Wien).
Classic locality

More than an excellent specimen from Herja mine, a world-class Romanian locality for stibnite. This piece, of a very good size, is formed by several groups of thick prismatic crystals with visible terminal faces. We can observe a second generation of thin crystals. Nowadays it is difficult to find samples of this quality, for museum display cases. It belongs from a former Austrian collection.

Size: 13 x 5.7 x 4.5 cm.
Main crystal: 11 x 0.6 cm.
Found in ±1980.

Col. F. Schweiger (Wien).
Classic locality