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An very attractive group of tabular Siderite crystals with defined color zones in its peripheries. The group is on a matrix in of Arsenopyrite, Sphalerite, Quartz and Pyrite.
Minas da Panasqueira, level 3, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro Portugal (2004)
Specimen size: 7.2 × 5 × 4.5 cm = 2.83” × 1.97” × 1.77”

JFD92AO1: Siderite with Arsenopyrite and Muscovite

I do feel a little love for the siderites of Panasqueira. With much less fame than other mineral species from this mine, its variety of forms and its frequent association with other species always attracted me. This specimen well represents what I want to say - The crystal is sharp, its color is pleasant and it shows in its center a kind of growth phantom of trigonal symmetry. In addition, it is associated with Muscovite and Arsenopyrite, both of good quality.
Minas da Panasqueira, level 2, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro Portugal (03/1995)
Specimen size: 6.2 × 5.1 × 2.6 cm = 2.44” × 2.01” × 1.02”

Main crystal size: 5.1 × 4.2 cm = 2.01” × 1.65”

NB86AC4: Siderite with Arsenopyrite, Pyrite and Muscovite

Parallel aggregates of very flattened rhombohedral Siderite crystals on matrix, with leafy Muscovite aggregates and very well defined and bright Arsenopyrite crystals partially coated by small Pyrite crystals. The upper levels of Panasqueira are currently offering surprising and pleasant novelties, with samples that are different from what is already known.
Minas da Panasqueira, level 0, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro Portugal (08/2015)
Specimen size: 7.2 × 5.5 × 3 cm = 2.83” × 2.17” × 1.18”

MC9Y9: Siderite with Baryte

Botryoidal Baryte aggregate with a reddish color due to reddish slate inclusions. With botryoidal Siderite that has very dark brown color, almost black, and with small white and very acute scalenohedral Calcite crystals. The sample is from a locality that is rarely represented in mineral collections.
Christiane Mine, Adorf, Diemelsee, Waldeck-Frankenberg District, Hesse/Hessen Germany (±1950)
Specimen size: 4.5 × 3.3 × 2.7 cm = 1.77” × 1.30” × 1.06”

SV2160TGM: Siderite with Calcite

Group of very sharp lenticular crystals of Siderite with different shades of brown, some of them very aerial and more developed. On the back of the piece a delicate group of very fine tabular Calcite crystals with a pale cream color adorns the piece. It is amazing that the specimen came from an area of coal mines, at La Mure.
La Mure coal mines, La Mure, Matheysine-Trièves, Grenoble, Isère, Auvergne-Rhône-Alpes France
Specimen size: 6.6 × 3.6 × 4.5 cm = 2.60” × 1.42” × 1.77”

ERM68AP2: Siderite with Calcite and Pyrite

Flattened lenticular Siderite crystals, translucent, lustrous, and light brown in color, uniform, with golden tones. On matrix, with white lenticular Calcite crystals and small Pyrite crystals. An excellent French classic,
La Mure coal mines, La Mure, Matheysine-Trièves, Grenoble, Isère, Auvergne-Rhône-Alpes France
Specimen size: 16.2 × 9.8 × 5.3 cm = 6.38” × 3.86” × 2.09”

Main crystal size: 2.7 × 1.3 cm = 1.06” × 0.51”

TT13AN2: Siderite with Calcite and Sphalerite

Group of Siderite crystals with sharp crystal forms, with slight curvatures, a satin luster and a highly contrasted double coloration, with darker and lighter brown areas. On matrix, with small crystals of Calcite and Sphalerite. We will send the specimen in its original Perky box from the Robert J. Noble collection, which also contains the label, which shows that it was previously in the Alfredo Petrov collection.
Siglo Veinte Mine, Llallagua, Rafael Bustillo Province, Potosí Department Bolivia
Specimen size: 2.6 × 2.5 × 1.7 cm = 1.02” × 0.98” × 0.67”

ST96AE3: Siderite with Calcite and Sphalerite

Two generations of Siderite crystals on matrix. The first forms a tapestry of small thick-tabular crystals with very well defined forms and the second is with larger polycrystalline aggregates with very curved faces.
The sample is with a label from the Stoppani collection that we’ll send to the buyer
Maramures Romania
Specimen size: 12.5 × 10.8 × 4.2 cm = 4.92” × 4.25” × 1.65”

Main crystal size: 2.7 × 1.8 cm = 1.06” × 0.71”

MG56AB1: Siderite with Dolomite, Calcite, Ferberite and Pyrite

Group of lenticular Siderite crystals partially coated by Calcite crystals and with a notable aggregate of white rhombohedral Dolomite crystals with geometric growths. It is also with a small aggregate of poorly defined Ferberite crystals and is partially coated by Pyrite microcrystals.
Minas da Panasqueira, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro Portugal
Specimen size: 9.4 × 5.2 × 3.6 cm = 3.70” × 2.05” × 1.42”

MD12AE6: Siderite with Ferberite and Quartz

Elegant, platy Siderite crystals with a warm brown color. They are implanted on a twinned Ferberite crystal and are with transparent colorless Quartz.
Minas da Panasqueira, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro Portugal
Specimen size: 3.8 × 3 × 3.1 cm = 1.50” × 1.18” × 1.22”

Main crystal size: 2.8 × 1.1 cm = 1.10” × 0.43”

JFD207AP5: Siderite with Ferberite, Pyrite, Chalcopyrite and Calcite-Dolomite

Panasqueira has been producing well-crystallized specimens of all kinds of mineral species for many decades. This great mine is distinguished not only by its fluorapatites, but its siderites too are of high quality and their crystal habits can be very varied. In addition, other well-crystallized species may be associated with them, such as Ferberite, small crystals of Pyrite and Chalcopyrite, and Calcite-Dolomite.
Minas da Panasqueira, level 3, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro Portugal (02/1999)
Specimen size: 12.3 × 9.4 × 6.8 cm = 4.84” × 3.70” × 2.68”

MF14AH7: Siderite with Fluorapatite

Floater rhombohedral Siderite crystal with apparent foliations that really are recrystallizations. Its honey color and the transparency are not usual for Siderite from this mine, generally it is more opaque. There is an associated growth of uncommon doubly terminated Fluorapatite crystals, between translucent and transparent, bright and white in color. These unexpected Fluorapatite crystals have been analyzed and we will send a copy of the analysis to the buyer.
Minas da Panasqueira, level 1, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro Portugal (10/2015)
Specimen size: 2.7 × 2.5 × 1.2 cm = 1.06” × 0.98” × 0.47”

NR16AM8: Siderite with Fluorapatite and Mica

Two generations of Siderite crystals, a first with large, tabular crystals, and a second generation of small, lenticular crystals, with a color between brown and cream, with small tabular Fluorapatite crystals and groups of lamellar Muscovite crystals.
Minas da Panasqueira, level 3, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro Portugal (2000)
Specimen size: 12.8 × 8.3 × 4.7 cm = 5.04” × 3.27” × 1.85”

N96CG3: Siderite with Fluorapatite and Quartz

A very large crystal. Its color is lovely and the trigonal symmetry is clearly revealed by its triangular central face. On the surface of its faces appear, recrystallized and with color zoning, some little crystals of the same Siderite with Fluorapatite and Quartz.
Minas da Panasqueira, level 3, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro Portugal (1999)
Specimen size: 11.5 × 9.5 × 5.5 cm = 4.53” × 3.74” × 2.17”

SK47AD3: Siderite with Fluorite and Dolomite

Aggregate of very Sharp rhombohedral Siderite crystals, with polycrystalline growths and a single cubic Fluorite crystal, transparent and with a blue color and violet color zones. We note the locality which is really uncommon.
The sample is from the Francesco S. Stoppani collection (catalog number 0614), and was previously in the J.H. Marshall Jr. collection (catalog number 2640). We'll send to the buyer the Stoppani label and the label and card from the Marshall Jr. collection. As is the case with so many specimens in this collection, the sample is of great quality for the locality.
Khoroshiv (Volodarsk-Volynskii), Zhytomyr Oblast Ukraine
Specimen size: 6.7 × 4.9 × 3.6 cm = 2.64” × 1.93” × 1.42”

NAF37AO4: Siderite with Galena

Siderite druse covering Galena crystals, as spheroidal growths of small rhombohedral crystals with curvatures on their faces and edges, with satiny luster and uniform brown color. The specimen comes from the Miguel David Martínez collection (number 850), whose label we will send to the buyer.
San Valentín open pit, Sancti Espíritu, Sierra Minera de Cartagena-La Unión, La Unión, Comarca Campo de Cartagena, Region of Murcia (Murcia) Spain
Specimen size: 9.9 × 7.8 × 4.9 cm = 3.90” × 3.07” × 1.93”

Main crystal size: 1.3 × 1.1 cm = 0.51” × 0.43”

NFG47AO0: Siderite with Galena

Siderite druse covering Galena crystals. The Siderite has spheroidal growths of small rhombohedral crystals with curvatures on their faces and edges, satiny luster and uniform brown color. The specimen comes from the Miguel David Martínez collection (nº 794), whose label we will send to the buyer. It was previously in the collection of Mariano Guillén.
San Valentín open pit, Sancti Espíritu, Sierra Minera de Cartagena-La Unión, La Unión, Comarca Campo de Cartagena, Region of Murcia (Murcia) Spain
Specimen size: 11.7 × 9.9 × 4.4 cm = 4.61” × 3.90” × 1.73”

SB67AB8: Siderite with inclusions

Echeloned growths of rhombohedral Siderite crystals with a clear cream color and darker areas due to inclusions. As is the case with so many specimens in this collection, the sample is of great quality for the locality.
Müsen, Siegerland, North Rhine-Westphalia/Nordrhein-Westfalen Germany
Specimen size: 11 × 7.5 × 4.1 cm = 4.33” × 2.95” × 1.61”

Main crystal size: 4 × 2.5 cm = 1.57” × 0.98”

EV46W2: Siderite with Marcasite and Quartz

Nice rosettes of Siderite partially covered by flattened crystals of Marcasite that show, very well marked, the twin known as "cockscomb" and with minor Quartz.
Bou Nahas Mine, Oumjrane mining area, Alnif Commune, Tinghir Province, Drâa-Tafilalet Region Morocco (12/2011-01/2012)
Specimen size: 5.3 × 4.7 × 4.7 cm = 2.09” × 1.85” × 1.85”

NZR47AN4: Siderite with Muscovite

Group of large, very sharp rhombohedral Siderite crystals with a dark brown color, translucent on the edges and with small partial coatings of a second generation of Siderite with a lighter cream color. They are associated with leafy muscovite aggregates. We highlight the unusual fact that the first generation of Siderite is dominant in this piece, since in Panasqueira it is very rare that this first generation, with its darker color and a certain transparency, is not covered by a second generation of Siderite with a lighter color but much more opaque, which is what gives the siderites there their characteristic appearance.
Minas da Panasqueira, level 2, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro Portugal (10/2017)
Specimen size: 14.3 × 10.8 × 5.2 cm = 5.63” × 4.25” × 2.05”

Main crystal size: 6 × 5 cm = 2.36” × 1.97”

JBC36AP8: Siderite with Pyrite

Druse of lenticular Siderite crystals with a light brown color, good luster, and with coatings of Pyrite microcrystals. The specimen comes from the collection of Andrés Jiménez Shelly.
Bodovalle Mine, Gallarta, Abanto y Ciérvana/Abanto Zierbena, Comarca Gran Bilbao, Vizcaya / Bizkaia, Basque Country (Euskadi) Spain (1979)
Specimen size: 8.4 × 6.1 × 2.2 cm = 3.31” × 2.40” × 0.87”

SA88AC3: Siderite with Pyrite

Aggregate of rhombohedral Siderite crystals with slightly curved faces and very bright and “paved” surfaces partially coated by small Pyrite crystals. It is an excellent German classic for the species and the locality. As is the case with so many specimens in this collection, the sample is of great quality for the locality.
Georg Mine, Willroth, Flammersfeld, Altenkirchen (Westerwald), Siegerland, Rhineland-Palatinate/Rheinland-Pfalz Germany
Specimen size: 14 × 7.8 × 3.7 cm = 5.51” × 3.07” × 1.46”

Main crystal size: 2.1 × 1.5 cm = 0.83” × 0.59”

TFR88AP9: Siderite with Pyrite

Group of sharp rhombohedral Siderite crystals, translucent, lustrous, brown with golden reflections, and with small Pyrite crystals on the surfaces of the faces. A French classic that comes from the Grégoire de Bodinat.
Saint-Pierre-de-Mésage, Vizille, Grenoble, Isère, Auvergne-Rhône-Alpes France
Specimen size: 8.7 × 6.8 × 6.6 cm = 3.43” × 2.68” × 2.60”

TE69AG9: Siderite with Pyrite

Growths of small Siderite crystals outlining the rhombohedral forms of much larger platy Siderite crystals, a product of crystallization of a second generation upon a first generation. Typical of samples from the extinct Turt mine.
Turt Mine, Turt, Negresti-Oas, Oas Mountains, Satu Mare Romania
Specimen size: 14.3 × 9 × 4.8 cm = 5.63” × 3.54” × 1.89”

TB8M9: Siderite with Pyrite

Group of lenticular crystals that have a very contrasted doubly coloration, with both dark and yellowish-brown areas. They are on matrix, with small crystals of Pyrite that are complex, with the predominant forms of the octahedron.
Tres Cruces, Potosí Bolivia
Specimen size: 4.9 × 4.3 × 3.3 cm = 1.93” × 1.69” × 1.30”

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