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N12TK0: Siderite with Quartz and Fluorapatite
Group of first generation crystals, so they are translucent and have an excellent color and luster. On the Siderite there is a small group of tabular Fluorapatite crystals and Quartz crystals. This type of first generation Siderite is very uncommon at Panasqueira.
Minas da Panasqueira, level 2, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro  Portugal (1995)
Specimen size: 6.6 × 4.4 × 2.1 cm = 2.60” × 1.73” × 0.83”
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E12EK9: Siderite with Quartz and inclusions
Flattened rhombohedral Siderite crystal group, covering Quartz and small crystals of Arsenopyrite and Pyrite some of them included on the Quartz.
Minas da Panasqueira, level 2, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro  Portugal (1997)
Specimen size: 11.8 × 8.6 × 5.5 cm = 4.65” × 3.39” × 2.17”

Main crystal size: 1.7 × 1.6 cm = 0.67” × 0.63”
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JFD229AP9: Siderite with Quartz and Pyrite
A very clear and perfect Quartz, with a very showy phantom, clearly displaying the different phases of crystal growth. The Siderite, very sharp and aerial, and with small Pyrite crystals adds its signature to the piece.
Minas da Panasqueira, level 2, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro  Portugal (1993)
Specimen size: 5.8 × 4.7 × 5 cm = 2.28” × 1.85” × 1.97”
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ND16G4: Siderite with Quartz and Pyrite
Rhombohedrons are very defined and its rough surface is a product of re-crystallization of the same Siderite. Crystals are aerial on a matrix of Quartz crystals with little crystallizations of Pyrite.
Turt Mine, Turt, Negresti-Oas, Oas Mountains, Satu Mare  Romania (2003)
Specimen size: 8.5 × 5.8 × 3.9 cm = 3.35” × 2.28” × 1.54”

Main crystal size: 3.6 × 2.9 cm = 1.42” × 1.14”
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EXB67AP1: Siderite with Quartz with Ferberite inclusions
Very aerial group of lenticular Siderite crystals of considerable size, one of them clearly dominant and very aerial, light cream in color and implanted on a crystal of Quartz with inclusions of small Ferberite crystals.
Minas da Panasqueira, levels 0-1, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro  Portugal (2021)
Specimen size: 12.7 × 7.4 × 5.4 cm = 5.00” × 2.91” × 2.13”
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NC76AB5: Siderite with Quartz, Chalcopyrite and Muscovite
Aggregate of lenticular Siderite crystals, one of them clearly dominant, with very well defined faces and edges and on a crystalline Quartz matrix with leafy Muscovite aggregates and a very well defined Chalcopyrite crystal.
Minas da Panasqueira, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro  Portugal (2004)
Specimen size: 11.4 × 5.5 × 3.2 cm = 4.49” × 2.17” × 1.26”

Main crystal size: 5.6 × 4.6 cm = 2.20” × 1.81”
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NA59AM8: Siderite with Quartz, Fluorapatite and Dravite-Schorl
Group of very sharp lenticular crystals of Siderite with polycrystalline growths, with good luster and a light cream color. On matrix, with crystals of Fluorapatite, Quartz and small acicular crystals of Dravite-Schorl. Very original and with a higher quality than usual in this locality.
Minas da Panasqueira, level 3, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro  Portugal (1998)
Specimen size: 7.7 × 4.1 × 6 cm = 3.03” × 1.61” × 2.36”
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MAE46AP6: Siderite with Quartz, Siderite inclusions and Arsenopyrite
Group of tabular Siderite crystals bordered by a second generation of Siderite, with a perfect Quartz crystal, without the typical small dings prevalent in specimens from this locality, transparent, very lustrous, with inclusions of Siderite and Arsenopyrite and a well-defined phantom growth whose visibility is accentuated by inclusions growing oriented on the faces of the successive phantom growths.
Minas da Panasqueira, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro  Portugal
Specimen size: 11.2 × 8.1 × 7.6 cm = 4.41” × 3.19” × 2.99”

Main crystal size: 8.9 × 3.6 cm = 3.50” × 1.42”
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2L14: Siderite, Dolomite, Quartz
Sharp rhombohedral crystals of Dolomite, twinned, accompanied by lenticular crystals of light brown Siderite with very marked edges, in a matrix carpeted with water-clear crystals of Quartz.
La Mure coal mines, La Mure, Matheysine-Trièves, Grenoble, Isère, Auvergne-Rhône-Alpes  France (1994)
Specimen size: 5.0 × 3.7 × 3.2 cm = 1.97” × 1.46” × 1.26”
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16NF13: Siderite, Quartz, Arsenopyrite, Muscovite, Pyrite
A plate formed by an aggregate of Muscovite crystals, interspersed with some lustrous Arsenopyrite crystals with well defined faces and edges, as well as water-clear Quartz crystals, one of them clearly dominant and with very marked growth striations. This combo is further adorned by a group of light brown lenticular Siderite crystals with a darker outline, some of them scattered and more isolated while others have grown on the Quartz crystals. Finally, a small group of Pyrite crystals completes the specimen. As so often happens with Panasqueira specimens, we can observe part of the paragenesis of the mine in a single piece.
Minas da Panasqueira, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro  Portugal
Specimen size: 11.0 × 10.0 × 3.0 cm = 4.33” × 3.94” × 1.18”

Main crystal size: 1.0 × 0.9 cm = 0.39” × 0.35”
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23TJA14: Siderite, Quartz, Pyrite
Group of doubly terminated Quartz crystals, one of them clearly dominant and adorned by a Siderite crystal of considerable size with a hexagonal outline and light brown tone on the back. Other smaller Siderite crystals associated with Pyrite crystals are sprinkled over it. A classic paragenesis for the Panasqueira mines from where this specimen came.
Minas da Panasqueira, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro  Portugal
Specimen size: 6.3 × 2.9 × 2.9 cm = 2.48” × 1.14” × 1.14”
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AC13M4: Siegenite with Chalcopyrite and Dolomite
One of the notable specimens from the Silvane Collection. From a classic locality for the species, very sharp octahedral Siegenite crystals with a more than considerable size on a very attractive and Dolomite-rich matrix with small twinned Chalcopyrite crystals. An extraordinary specimen.
Sweetwater Mine, Ellington, Viburnum Trend District, Reynolds County, Missouri  USA (06/1997)
Specimen size: 5.8 × 5.4 × 4.5 cm = 2.28” × 2.13” × 1.77”

Main crystal size: 0.9 × 0.8 cm = 0.35” × 0.31”
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CD14AM7: Silver
Aerial group, on matrix, with very bright leafy growths of Silver. From a well-known Mexican locality but one from which few collection specimens have been preserved.
The specimen comes from the Carles Curto collection, whose label and computer catalogue entry we will send to the buyer.
El Oro de Hidalgo, Municipio El Oro, State of Mexico  Mexico
Specimen size: 2.5 × 1.9 × 0.8 cm = 0.98” × 0.75” × 0.31”
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CM16AH5: Silver
Very bright arborescent Silver growth mainly composed by laminar surfaces and mossy aggregates but with a lens it is possible to see very well defined cubic and octahedral shaped crystals, some of them elongated. We’ll send to the buyer the original label and also a copy of the computer card with the full text of the collection catalog.
Kongsberg mining district, Kongsberg  Norway
Specimen size: 2.7 × 1.3 × 1 cm = 1.06” × 0.51” × 0.39”

Main crystal size: 0.1 × 0.1 cm = 0.04” × 0.04”
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CC56AL4: Silver
Aggregates of very elongated, fibrous Silver crystals, some of them with pronounced curvatures and fine dendritic growths and with small, poorly defined, Acanthite crystals.
The specimen comes from the Carles Curto collection, whose label and catalogue information we will send to the buyer.
Keeley-Frontier Mine, South Lorrain Township, Cobalt-Gowganda Region, Timiskaming District, Ontario  Canada (±1966)
Specimen size: 2.1 × 2 × 1.2 cm = 0.83” × 0.79” × 0.47”
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CB46AL3: Silver
Feather-like growth of Silver crystals in which a doubly terminated and very elongated crystal stands out, with the sharp profile of a spinel-law twin. The attached documentation shows that the specimen was extracted from the mine in 1979.
It comes from the Carles Curto collection (no. 1981.55), whose label and information sheet we will send to the buyer.
La Nevada Mine, Cerro San Antonio, San Miguel, Batopilas, Andrés del Río District, Municipio Batopilas, Chihuahua  Mexico
Specimen size: 2.9 × 2.8 × 0.7 cm = 1.14” × 1.10” × 0.28”

Main crystal size: 2.7 × 0.5 cm = 1.06” × 0.20”
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CP66AL4: Silver
Aggregate of cubic Silver crystals with small octahedron faces, some of them quite sharp, with very well defined crystalline shapes and others somewhat more rounded.
The specimen comes from the Carles Curto collection, whose label and catalogue information we will send to the buyer.
Encantada Mine, La Encantada, Municipio Melchor Múzquiz, Coahuila (Coahuila de Zaragoza)  Mexico
Specimen size: 2.4 × 2.3 × 1.5 cm = 0.94” × 0.91” × 0.59”
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CT86AJ7: Silver
Spongy aggregate of native Silver with clearly enhanced very elongated and hooked Silver crystals with octahedral terminal faces. The sample is from a classic Czech Republic locality.
Uranium Mine number 21 (shaft number 21), Háje, Příbram, Central Bohemia Region, Bohemia  Czech Republic
Specimen size: 5.6 × 3.3 × 2.6 cm = 2.20” × 1.30” × 1.02”

Main crystal size: 1 × 0.1 cm = 0.39” × 0.04”
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MB47AM9: Silver
Very aerial growth of three extraordinarily elongated Silver crystals that originate from a single common crystal. Very lustrous and with good terminal faces.
We will send the specimen, which comes from the Robert J. Noble collection, in its original Perky box from that collection, which also contains the label.
Endeavor Mine (Elura Mine), Cobar, Robinson County, New South Wales  Australia
Specimen size: 2.4 × 2.1 × 0.2 cm = 0.94” × 0.83” × 0.08”
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CB47AJ7: Silver
Dendritic aggregate on matrix of very elongated Silver crystals that form parallel growths and have very well defined octahedral terminations.
La Nevada Mine, Cerro San Antonio, San Miguel, Batopilas, Andrés del Río District, Municipio Batopilas, Chihuahua  Mexico
Specimen size: 4.1 × 3.5 × 2.3 cm = 1.61” × 1.38” × 0.91”

Main crystal size: 1.2 × 0.1 cm = 0.47” × 0.04”
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CV96AM5: Silver
Aggregate of elongated Silver crystals, with twists, hooked shapes and very sharp terminations. This specimen, a German classic, comes from the Carles Curto collection (number 1968.27), whose label and computer file we will send to the buyer.
Himmelsfürst Mine, Brand-Erbisdorf, Freiberg District, Erzgebirgskreis, Saxony/Sachsen  Germany
Specimen size: 3.3 × 2.8 × 1.8 cm = 1.30” × 1.10” × 0.71”
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MA77AF2: Silver
Dendritic growth of extraordinarily elongated crystals with the very visible spinel law twins and black Acanthite surfaces. Its excellent condition of preservation in spite of the long time since it was mined (the sample is from a collection of the 80s-90s) suggests it has no embedded or interstitial mercury. It is not, then, the variety kongsbergite, the more typical Silver at this locality.
Imiter Mine, Jebel Saghro, Imiter District, Tinghir Province, Drâa-Tafilalet Region  Morocco
Specimen size: 5.8 × 3.9 × 0.6 cm = 2.28” × 1.54” × 0.24”

Main crystal size: 1.1 × 0.1 cm = 0.43” × 0.04”
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TQ97AM9: Silver
A novelty post-Easter 2021: Isolated cubic Silver crystals and groups with extraordinarily well defined faces and edges, very bright, on a rock matrix with spathic Calcite, which has been acid-treated.
Aït Ahmane, Agdz, Bou Azzer mining district, Zagora Province, Drâa-Tafilalet Region  Morocco (12/2020)
Specimen size: 2.2 × 2.2 × 1 cm = 0.87” × 0.87” × 0.39”
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9TZ89Q0: Silver
A scultural growth, very aerial and esthetic, of microcrystals with skeletal forms, on matrix. The piece is from an old find in Imiter, probably around the decade of the 90’s and unusual as the habitual has a crystalline aspect. A Silver mine with epithermal origin.
Imiter Mine, Jebel Saghro, Imiter District, Tinghir Province, Drâa-Tafilalet Region  Morocco (±1990)
Specimen size: 6.8 × 5.5 × 2.9 cm = 2.68”

Main crystal size: 3.7 × 2.2 cm = 1.46”
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MFX50AP3: Silver
Obtained at Munich 2022 Very aerial dendritic growth of deformed Silver crystals. This specimen comes from one of the large classic localities for the species, and is accompanied by unusually detailed locality information stating that it was found in the Fischer Morgengang section of the St. Georg. It comes from the old collection of Dr. Bartnik, of Leipzig, whose label we will send to the buyer.
St. Georg Mine, Fleischer Morgengang section, Neustädtel, Schneeberg District, Erzgebirgskreis, Saxony/Sachsen  Germany
Specimen size: 3.8 × 4.2 × 1 cm = 1.50” × 1.65” × 0.39”

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The Pedro Goy Collection
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Collection		 The Desmond Sacco Collection
The Desmond Sacco
Collection		 Best Specimens
Best Specimens		 The Folch Collection
The Folch
Collection		 Home Page Minerals
Home Page
Minerals