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MR32AB1: Genthelvite with Quartz, Calcite and Chlorite
Very sharp polycrystalline Genthelvite growth with a neatly tetrahedral shape and dark brown color. It is on a matrix with Quartz crystals and extremely flattened Calcite crystals (papierspat). Analyzed by Raman, the sample is Genthelvite both on its surface and its interior. We’ll send a copy of the analysis to the buyer.
Huanggang Mines, Hexigten Banner (Kèshíkèténg Qí), Chifeng (Ulanhad), Inner Mongolia Autonomous Region  China (2014)
Specimen size: 8.3 × 5.5 × 4 cm = 3.27” × 2.17” × 1.57”
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TP26AH6: Geocronite
Very sharp, aerial and complete crystal of Geocronite, a rare lead sulphosalt, uncommon in such a large and great quality crystal. The crystal is free of damage, shows echeloned growths on one of its sides and is unusually bright. The lateral side on the third image is rough but complete, not broken.
We’ll send the sample in its original Perkin’s box from the R.J. Noble collection, also containing the collection label.
Pollone Mine, Valdicastello Carducci, Pietrasanta Municipality, Lucca Province, Tuscany  Italy
Specimen size: 2.6 × 1.5 × 1 cm = 1.02” × 0.59” × 0.39”
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MTX88AP2: Geocronite with Fluorite
A new discovery at Munich 2022 High quality Geocronite crystals with sharp crystal forms and polycrystalline growths marked by striations, associated with crystals of slightly translucent, apple-green Fluorite which, due to the contrast with the Geocronite, generates very aesthetic pieces. The Geocronite has been analyzed and we will send a copy of the analysis to the buyer.
Milpo Mine, Cerro de Pasco, Atacocha mining district, Pasco Province, Pasco Department  Peru (07-08/2022)
Specimen size: 2.6 × 2.1 × 1.7 cm = 1.02” × 0.83” × 0.67”
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MLP99AP2: Geocronite with Fluorite
A new discovery at Munich 2022 High quality Geocronite crystals with sharp crystal forms and polycrystalline growths marked by striations, associated with crystals of slightly translucent, apple-green Fluorite which, due to the contrast with the Geocronite, generates very aesthetic pieces. The Geocronite has been analyzed and we will send a copy of the analysis to the buyer.
Milpo Mine, Cerro de Pasco, Atacocha mining district, Pasco Province, Pasco Department  Peru (07-08/2022)
Specimen size: 2.6 × 2.5 × 2 cm = 1.02” × 0.98” × 0.79”
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MRR14AP2: Geocronite with Fluorite
A new discovery at Munich 2022 High quality Geocronite crystals with sharp crystal forms and polycrystalline growths marked by striations, associated with crystals of slightly translucent, apple-green Fluorite which, due to the contrast with the Geocronite, generates very aesthetic pieces. The Geocronite has been analyzed and we will send a copy of the analysis to the buyer.
Milpo Mine, Cerro de Pasco, Atacocha mining district, Pasco Province, Pasco Department  Peru (07-08/2022)
Specimen size: 4 × 3.2 × 1.8 cm = 1.57” × 1.26” × 0.71”
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MFA46AP2: Geocronite with Fluorite
A new discovery at Munich 2022 High quality Geocronite crystals with sharp crystal forms and polycrystalline growths marked by striations, associated with crystals of slightly translucent, apple-green Fluorite which, due to the contrast with the Geocronite, generates very aesthetic pieces. The Geocronite has been analyzed and we will send a copy of the analysis to the buyer.
Milpo Mine, Cerro de Pasco, Atacocha mining district, Pasco Province, Pasco Department  Peru (07-08/2022)
Specimen size: 4.4 × 3.1 × 2.2 cm = 1.73” × 1.22” × 0.87”
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MFR57AP2: Geocronite with Fluorite
A new discovery at Munich 2022 High quality Geocronite crystals with sharp crystal forms and polycrystalline growths marked by striations, associated with crystals of slightly translucent, apple-green Fluorite which, due to the contrast with the Geocronite, generates very aesthetic pieces. The Geocronite has been analyzed and we will send a copy of the analysis to the buyer.
This specimen has been published on the Mineralogical Record´s web page, in the 'What’s New on the Internet Reports' section, report 65, November 15, 2022 edition, page 2
Milpo Mine, Cerro de Pasco, Atacocha mining district, Pasco Province, Pasco Department  Peru (07-08/2022)
Specimen size: 6.2 × 5.1 × 3 cm = 2.44” × 2.01” × 1.18”
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NHD86AQ1: Geocronite with Galena and Fluorite (octahedral)
Geocronite crystals with very sharp crystal forms and with an intense luster that distinguishes it from the darker matte Galena which accompanies it on the matrix, along with several green and transparent octahedral crystals of Fluorite.
Milpo Mine, Cerro de Pasco, Atacocha mining district, Pasco Province, Pasco Department  Peru (07-08/2022)
Specimen size: 7.1 × 5.9 × 2.9 cm = 2.80” × 2.32” × 1.14”
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CA14AJ7: Germanite
Typical granular Germanite aggregate with a polished surface to better appreciate the characteristics of this rare copper, iron and germaniun sulphosalt. With a pinkish gray color and is with Renierite that has a more intense pink color, and black Tennantite. The sample is from the type locality for the species.
Tsumeb Mine, Tsumeb, Otjikoto Region  Namibia (±1981)
Specimen size: 6.2 × 3.8 × 2.3 cm = 2.44” × 1.50” × 0.91”
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JFD156AO7: Gersdorffite
Except in its top specimens, Gersdorffite is not a species that usually gives showy pieces. This one, although modest, has the elegance of having sharp crystals, hanging from a kind of pinnacle of another Gersdorffite crystal which, although coarser, makes the other crystals look better.
Aït Ahmane, Agdz, Bou Azzer mining district, Zagora Province, Drâa-Tafilalet Region  Morocco (11/2012)
Specimen size: 3.4 × 2.2 × 1.5 cm = 1.34” × 0.87” × 0.59”

Main crystal size: 1.2 × 1.1 cm = 0.47” × 0.43”
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AB37AL3: Gersdorffite
Group of very sharp octahedral Gersdorffite crystals of good size, with polycrystalline growths on the surfaces of the faces.
Aït Ahmane, Agdz, Bou Azzer mining district, Zagora Province, Drâa-Tafilalet Region  Morocco (±2010)
Specimen size: 4.1 × 3.2 × 1.3 cm = 1.61” × 1.26” × 0.51”
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EJ66T4: Gersdorffite with Calcite
From a recent find this same year. The octahedral crystals, with very well defined faces and edges, have a considerable size for the species and are unusually fresh and bright. They are on matrix, with Calcite that has not been acid-etched.
Aït Ahmane, Agdz, Bou Azzer mining district, Zagora Province, Drâa-Tafilalet Region  Morocco (03/2011)
Specimen size: 5.2 × 4.7 × 4.1 cm = 2.05” × 1.85” × 1.61”

Main crystal size: 1.4 × 1.2 cm = 0.55” × 0.47”
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EV99Y2: Gersdorffite with Calcite
Very aerial aggregate of very sharp octahedral crystals. They are extraordinarily bright, a very uncommon quality for the species, and it is on matrix, with Quartz.
Aït Ahmane, Agdz, Bou Azzer mining district, Zagora Province, Drâa-Tafilalet Region  Morocco (11/2012)
Specimen size: 7.3 × 5 × 2.3 cm = 2.87” × 1.97” × 0.91”
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EM49T0: Gersdorffite with Calcite and Annabergite
A novelty at Sainte Marie-aux-Mines 2011. Very aerial group of sharp octahedral crystals of Gersdorffite. They are bright and are on a matrix of Calcite, with thin coatings of slightly green Annabergite.
The specimen has been reviewed, photographed and published as a new discovery in the magazine ‘Mineral Up’ on page 29 in number 2011/2
Aït Ahmane, Agdz, Bou Azzer mining district, Zagora Province, Drâa-Tafilalet Region  Morocco (03/2011)
Specimen size: 6.2 × 5.8 × 3.7 cm = 2.44” × 2.28” × 1.46”

Main crystal size: 0.9 × 0.9 cm = 0.35” × 0.35”
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EY89Y2: Gersdorffite with Calcite and Quartz
Very sharp octahedral crystal, of a large size for the species. It is extraordinarily bright, a very uncommon quality for the species, and it is on a Quartz matrix. It has a small contact on one of the lower vertices and the whole back side.
Aït Ahmane, Agdz, Bou Azzer mining district, Zagora Province, Drâa-Tafilalet Region  Morocco (11/2012)
Specimen size: 4 × 2.8 × 2.2 cm = 1.57” × 1.10” × 0.87”
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MB26AN2: Gersdorffite with Nickeline and Annabergite
Large group of octahedral Gersdorffite crystals of good size, very sharp, isolated and lustrous. On a Nickeline matrix, which guarantees stability to the whole piece, and small green Annabergite coatings. Simply exceptional.
Aït Ahmane, Agdz, Bou Azzer mining district, Zagora Province, Drâa-Tafilalet Region  Morocco (04/2017)
Specimen size: 16 × 11.2 × 10.7 cm = 6.30” × 4.41” × 4.21”

Main crystal size: 2 × 1.8 cm = 0.79” × 0.71”
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RQ61AE6: Getchellite with Realgar and Orpiment
Masses of partial crystals and foliation surfaces of Getchellite that have a very intense vermillion color. They are on matrix with crystalline Realgar that has a more bloody red color, and with radial leafy Orpiment aggregates.
The sample is from the Joaquín Folch duplicates collection, whose label we’ll send to the buyer.
Getchell Mine, Adam Peak, Potosi District, Osgood Mountains, Humboldt County, Nevada  USA (±1976)
Specimen size: 6.8 × 5.8 × 4 cm = 2.68” × 2.28” × 1.57”
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EF7T0: Gismondine with Calcite, Epidote and Chlorite
A novelty at Sainte Marie-aux-Mines 2011. Sharp and very well individualized white dipyramidal crystals of Gismondine, one of them clearly dominant, with very well defined faces and edges. On matrix, with bluish Calcite, Epidote and Chlorite.
The specimen has been reviewed, photographed and published as a new discovery in the magazine ‘Mineral Up’ on page 29 in number 2011/2
Vedretta della Miniera, Val Zebrù, Valfurva, Sondrio, Lombardia, Italia  Italy (09/2010)
Specimen size: 4.6 × 3.5 × 3.7 cm = 1.81” × 1.38” × 1.46”

Main crystal size: 0.6 × 0.6 cm = 0.24” × 0.24”
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NH7AC2: Goethite
Botryoidal growths with intense metallic-iridescent patinas, very bright and showing strongly contrasting coloration, with dominant red, yellowish and orange shades. These growths contrast with a later phase with smaller and grayish botryoidal forms. The sample is from a famous 2007 find.
Filón Sur open pit, Minas de Tharsis, Tharsis, Alosno, Comarca El Andévalo, Huelva, Andalusia  Spain (05-10/2007)
Specimen size: 3.2 × 2.7 × 1.7 cm = 1.26” × 1.06” × 0.67”
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NC9AM1: Goethite
Compared to other Goethites in southern Spain, those from the La Lapilla mine stand out for their delicate lattice growths and very fine arched structures, sometimes almost filamentous, which adds to the quality of their soft iridescence, with pastel blue, ocher, and reddish, although greyish metallic reflections predominate.
La Lapilla Mine, La Lapilla, Alosno, Comarca El Andévalo, Huelva, Andalusia  Spain (03-04/2008)
Specimen size: 6.2 × 4.2 × 0.7 cm = 2.44” × 1.65” × 0.28”
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NP8AC2: Goethite
Botryoidal growths with intense metallic-iridescent patinas, very bright and showing strongly contrasting coloration, with dominant red, yellowish and orange shades. These growths contrast with a later phase with smaller and grayish botryoidal forms. The sample is from a famous 2007 find.
Filón Sur open pit, Minas de Tharsis, Tharsis, Alosno, Comarca El Andévalo, Huelva, Andalusia  Spain (05-10/2007)
Specimen size: 4.2 × 4.1 × 2.4 cm = 1.65”
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NY57AC2: Goethite
Botryoidal stalactitic aggregate with intensely metallic-iridescent patinas, very bright and showing strongly contrasting coloration, with dominant yellowish and orange shades. These growths contrast with a later phase with smaller and grayish-red botryoidal forms. The sample is from a famous 2007 find.
Filón Sur open pit, Minas de Tharsis, Tharsis, Alosno, Comarca El Andévalo, Huelva, Andalusia  Spain (05-10/2007)
Specimen size: 8.3 × 4.7 × 4 cm = 3.27” × 1.85” × 1.57”
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DD62AH2: Goethite
Extraordinarily bright botryoidal aggregate with some iridescent areas with predominant yellow and blue shades. The sample is from a locality considered a Spanish classic for Goethite, but where such bright samples with iridescent surfaces were quite rare.
The Daunis collection was, in the 70’s and the 80’s, a reference for the local prospectors of the Barcelona area.
La Arboleda Mines, La Arboleda (Zugaztieta), Valle de Trápaga/Trapagaran, Comarca Gran Bilbao, Vizcaya / Bizkaia, Basque Country (Euskadi)  Spain
Specimen size: 8.7 × 5 × 4.8 cm = 3.43” × 1.97” × 1.89”
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TC80NZ: Goethite
Botryoidal and stalactitic Goethite growths with variegated metallic iridescence of dominant reddish and gray tones. The specimen comes from a famous find in 2007.
Filón Sur open pit, Minas de Tharsis, Tharsis, Alosno, Comarca El Andévalo, Huelva, Andalusia  Spain (05-10/2007)
Specimen size: 7.9 × 4.9 × 3 cm = 3.11” × 1.93” × 1.18”
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NB13AL3: Goethite
Aggregate with spheroidal Goethite growths with variegated metallic iridescence, very bright, with shades of yellow, blue and greenish grey. From a locality that in general does not stand out for its Goethites.
Haití Mine, Cabezo de San Ginés, San Ginés de la Jara, Cartagena, Comarca Campo de Cartagena, Region of Murcia (Murcia)  Spain (09/2016)
Specimen size: 10.2 × 8.7 × 3.3 cm = 4.02” × 3.43” × 1.30”

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The James Catmur
Collections
The Silvane Collection
The Silvane
Collection
The Pedro Goy Collection
The Pedro Goy
Collection
The Desmond Sacco Collection
The Desmond Sacco
Collection
Best Specimens
Best Specimens
The Folch Collection
The Folch
Collection
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Minerals