Mineral Specimens - page 18
The Carles Curto Collection (duplicates)

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Carles Curto Text: Carles Curto (formerly curator of the Geology Museum, Barcelona) & Jordi Fabre
Assistance from John S. White (former Smithsonian curator) John S. White

 


Born in Barcelona in 1950. Right from my early childhood, at the age of ten, and thanks to the mountaineer and naturalist who was my maternal grandfather (who gave me my first collection in 1960), I got in touch with the world of minerals, a hobby that was still a little unknown back then but that was clarified by frequent visits to the Geology Museum in Barcelona and the "old style" shop of Soler Pujol, in the Plaza Real of downtown Barcelona city. In both places I had the opportunity to get to know, along with other newcomers to the hobby, the most expert and highest level collectors, such as D. Josep Cervelló and D. Joaquín Folch.

Between 1962 and 1965, after many Saturday mornings in the Geology Museum in Barcelona, with the ineffable presence of the concierge, D. Francisco García Espino, who sold us modest specimens, always accompanied by some interesting explanation, and with visits to other private collections I was made aware of what could really interest me and I made a qualitative first selection among the wide mix of various objects that I had accumulated and I eliminated a good number of them from a jumble of massive minerals, rocks and fossils (and, why not say it: "pebbles")

In 1969 I decided to start my university studies in the Faculty of Geology of the University of Barcelona, requesting, at the same time, a scholarship from the Municipal Museum of Geology, entering, in 1973, as an interim curator. It was not until years later the 1978 that I became -after examination- to the position of curator.

At the beginning of the seventies, coinciding with an era of special mineralogical activity, the collection continued to grow based on a "classic" (systematic-crystallographic) model, but with more attention to aspects of documentation and genetic interest than to other more "aesthetic" aspects . I was particularly struck by the crystalline morphology and the mineralogical "curiosities", with the final result being an eclectic collection, maybe very irregular, but full of suggestions and surprises and that ended up branching into a section of miniatures.

 

Carles Curto

With the arrival of computerization, in the early eighties, I decided to seriously address the cataloging and bibliography, which I took advantage of to donate a large part of my collection to the Geology Museum of the School of Mining Engineers of the Polytechnic University of Manresa and, many of the most beautiful and significant specimens, to the Museum of Geology (now Museum of Natural Sciences) of Barcelona. It was also at this time that I developed more academic activity and started to inform other people, with numerous publications and collaborations.

In 2017, retired, I decided to make a new start (is it a matter of age?), take a mineralogical break, limit what really interests me and go about reducing things that no longer fit, which is what I have time to do.

Be kind with my selection and enjoy it.

 

USA

Franklinite with Calcite
Franklinite with Calcite. Front
Front
Franklinite with Calcite. Rear
Rear
Franklinite with Calcite  

CR66AJ0: Octahedral Franklinite crystal on matrix with the classical shape of the samples from Franklin in the sixties of the last century. It has very well defined faces and edges which are slightly curved. An American classic from the type locality for the species.
The sample is from the Carles Curto collection whose label and catalog card we will send to the buyer.
Franklin, Franklin Mining District, Sussex County, New Jersey  USA

Specimen size: 2.5 × 2.5 × 2.1 cm = 0.98” × 0.98” × 0.83”

Former collection of Carles Curto (duplicates)

minID: 5W5-UWD




Spain

Pyromorphite

Fluorescent light (daylight)
Pyromorphite
 

CRM96AP1: Acicular crystals of yellowish green Pyromorphite with curvatures on the faces and edges, with good luster, on matrix.
The specimen comes from the Carles Curto collection duplicates (number 2008.23), whose label and computer entry we will send to the buyer. Previously in the collection of Silvane (Josep Amigó), from Barcelona.
El Horcajo Mines, El Horcajo, Almodóvar del Campo, Comarca Campo de Calatrava, Ciudad Real, Castilla-La Mancha  Spain

Specimen size: 5.5 × 2.5 × 2.0 cm = 2.17” × 0.98” × 0.79”

Main crystal size: 0.8 × 0.1 cm = 0.31” × 0.04”

Minor fluorescence long & short UV

Former collection of Carles Curto (duplicates)

minID: 277-6Y9



Pyromorphite. Front / Photo: Joaquim Callén
Front / Photo: Joaquim Callén
Pyromorphite. Rear / Photo: Joaquim Callén
Rear / Photo: Joaquim Callén

Europe (excl. Spain and France)

Pyrargyrite
Pyrargyrite. Pyrargyrite.
Pyrargyrite  

CV68AM5: Group of crystals with a short prismatic habit and a very sharp hexagonal outline, with good terminations, and a bright luster. The specimen comes from the Carles Curto collection (number 1976.23), whose label and computer file we will send to the buyer.
Bad Schlema (Schlema), Schlema-Hartenstein District, Erzgebirgskreis, Saxony/Sachsen  Germany

Specimen size: 2.8 × 2.5 × 1.6 cm = 1.10” × 0.98” × 0.63”

Main crystal size: 1.4 × 1.2 cm = 0.55” × 0.47”

Former collection of Carles Curto (duplicates)



Sulphur with Celestine

Fluorescent light (daylight)
 

TC2120DLM: Floater Sulphur crystal with a truncated bipyramidal shape, with polycrystalline growths on their faces, translucent, with good luster and a very vivid color and with small white Celestine coatings.
With label from the Lluís Daunis collection.
Racalmuto Mine, Racalmuto, Agrigento (Girgenti) Province, Sicily  Italy

Specimen size: 3.4 × 3.2 × 2.1 cm = 1.34” × 1.26” × 0.83”

With label from the Lluís Daunis Collection

Former collection of Carles Curto (duplicates)



Sulphur with Celestine.
Libethenite
Libethenite. Libethenite.

Fluorescent light (daylight)
Libethenite
 

CBM87AP6: Groups of very sharp bipyramidal crystals of Libethenite, with good luster and a very deep color. On matrix and with small Calcite crystals.
An English classic that comes from the collection of duplicates of Carles Curto, whose label and computer file we will send to buyer.
Phoenix United Mine, Minions, Linkinhorne, Liskeard District, Cornwall  England / United Kingdom

Specimen size: 4.2 × 4.6 × 2 cm = 1.65” × 1.81” × 0.79”

Main crystal size: 0.1 × 0.1 cm = 0.04” × 0.04”

Former collection of Carles Curto (duplicates)

minID: J6H-RWK




Africa - Tsumeb

Africa

Acanthite
Acanthite  

SM90CEX: Parallel growths of Acanthite crystals of octahedral habit (pseudomorphs after Argentite), with sharp crystal forms.
The specimen comes from the Carles Curto collection (number 2008.25), whose handwritten label and computer file we will send to the buyer.
Imiter Mine, Jebel Saghro, Imiter District, Tinghir Province, Drâa-Tafilalet Region  Morocco (±2008)

Specimen size: 4.8 × 4.6 × 3.7 cm = 1.89” × 1.81” × 1.46”

Main crystal size: 0.6 × 0.5 cm = 0.24” × 0.20”

Former collection of Carles Curto (duplicates)



Acanthite. Front
Front
Acanthite. Rear
Rear
Acanthite.
Malachite xx with Dolomite and Quartz
Malachite xx with Dolomite and Quartz. Malachite xx with Dolomite and Quartz.
Malachite xx with Dolomite and Quartz  

CB96AN2: Parallel growths of equant crystals of primary Malachite, with good luster and a very deep and uniform color, on matrix with Dolomite.
The specimen comes from the Carles Curto collection (number 1978.14), whose label and computer catalogue entry we will send to the buyer.
Jebel Irhoud, Youssoufia Province, Marrakesh-Safi Region  Morocco

Specimen size: 4.6 × 2.8 × 2.6 cm = 1.81” × 1.10” × 1.02”

Main crystal size: 1 × 0.8 cm = 0.39” × 0.31”

Former collection of Carles Curto (duplicates)




Tsumeb

Malachite after Azurite with Azurite
Malachite after Azurite with Azurite  

CC27AM5: Group of Malachite pseudomorphs after Azurite crystals, one of them doubly terminated and clearly dominant, with surfaces recrystallized by finely fibrous Malachite with a silky luster. The specimen comes from the Carles Curto collection (number 1982.16.1), whose label and computer file we will send to the buyer.
Tsumeb Mine, Tsumeb, Otjikoto Region  Namibia (±1982)

Specimen size: 3.3 × 3.3 × 2.6 cm = 1.30” × 1.30” × 1.02”

Main crystal size: 3.1 × 2.3 cm = 1.22” × 0.91”

Former collection of Carles Curto (duplicates)

minID: NKC-DNU



Malachite after Azurite with Azurite. Front
Front
Malachite after Azurite with Azurite. Top
Top

Brazil

Hematite
Hematite. Front
Front
Hematite. Rear
Rear

Fluorescent light (daylight)
Hematite
 

CFR86AP9: Group of tabular Hematite crystals, one of them clearly dominant, very lustrous, with fine striations and geometric growth forms. A classic of Brazilian mineralogy.
The specimen comes from the Carles Curto collection of duplicates (number 1988.28) whose label and computer file we will send to the buyer.
Pedra Preta pit, Serra das Éguas, Brumado, Bahia, Northeast Region  Brazil

Specimen size: 3.2 × 3.1 × 0.6 cm = 1.26” × 1.22” × 0.24”

Main crystal size: 3.2 × 2.5 cm = 1.26” × 0.98”

Former collection of Carles Curto (duplicates)



Ernstite

Fluorescent light (daylight)
Ernstite
 

CTZ87AP6: Parallel growth of two twinned Ernstite crystals, pseudomorphs after Childrenite or Eosphorite, very sharp and of good size.
This specimen, of a species whose name could be modified in future, comes from the collection of duplicates of Carles Curto, whose label and computer file we will send to the buyer.
Córrego Frio Mine, Linópolis, Divino das Laranjeiras, Vale do Rio Doce, Minas Gerais  Brazil

Specimen size: 6.6 × 2.3 × 1.8 cm = 2.60” × 0.91” × 0.71”

Former collection of Carles Curto (duplicates)

minID: 5ND-5Y4



Ernstite. Front
Front
Ernstite. Rear
Rear

South America (excl. Brazil)

Copper
Copper. Copper.
Copper  

CY96AM5: Arborescent growth of very shiny Copper crystals with very well defined dodecahedron forms. An excellent miniature that comes from the Carles Curto collection (number 1984.24), whose label and computer file we will send to the buyer.
Corocoro, Pacajes Province, La Paz Department  Bolivia

Specimen size: 3.2 × 2.7 × 1.6 cm = 1.26” × 1.06” × 0.63”

Main crystal size: 0.8 × 0.5 cm = 0.31” × 0.20”

Former collection of Carles Curto (duplicates)



Franckeite with Stannite and Zinkenite
Franckeite with Stannite and Zinkenite  

CF69AJ4: Radial groups of very sharp and well defined flattened prismatic Franckeite crystals with an implanted dipyramidal Stannite crystal and small acicular Zinkenite crystals.
The sample is from the Carles Curto collection whose label and catalog card we will send to the buyer.
San José Mine, Oruro City, Cercado Province, Oruro Department  Bolivia (±1987)

Specimen size: 7.6 × 3.9 × 5.6 cm = 2.99” × 1.54” × 2.20”

Main crystal size: 1.2 × 1 cm = 0.47” × 0.39”

Former collection of Carles Curto (duplicates)



Franckeite with Stannite and Zinkenite. Franckeite with Stannite and Zinkenite.

China

Beryl (variety aquamarine) with Muscovite
Beryl (variety aquamarine) with Muscovite.

Fluorescent light (daylight)
Beryl (variety aquamarine) with Muscovite
 

CAR99AP7: Group of tabular Beryl crystals dominated by the pinacoid, with the prism faces being little developed. They are transparent, with very good luster and a uniform pale blue color (aquamarine variety), accompanied by very sharp and lustrous lamellar crystals of Muscovite.
This very elegant specimen comes from the Carles Curto collection's duplicates (number 2013.22), whose label and digital record we will send to the buyer.
Mount Xuebaoding, Pingwu, Mianyang Prefecture, Sichuan Province  China (±2013)

Specimen size: 7.1 × 4.8 × 2.6 cm = 2.80” × 1.89” × 1.02”

Main crystal size: 3.1 × 3.1 cm = 1.22” × 1.22”

Former collection of Carles Curto (duplicates)




Asia - Australia

Australia

Gold with Quartz

Fluorescent light (daylight)
Gold with Quartz
 

CPR73AP6: Group of very sharp octahedral Gold crystals, with very deeply hoppered faces, very lustrous and with small fragments of Quartz.
The specimen comes from the collection of duplicates of Carles Curto, whose label and computer file we will send to the buyer.
Poverty Reef, Tarnagulla, Loddon Shire, Victoria  Australia (±1987)

Specimen size: 1.7 × 1.7 × 0.7 cm = 0.67” × 0.67” × 0.28”

Main crystal size: 0.4 × 0.3 cm = 0.16” × 0.12”

Former collection of Carles Curto (duplicates)

Weight: 4.6 grams

minID: U38-M04



Gold with Quartz. Front / Photo: Joaquim Callén
Front / Photo: Joaquim Callén
Gold with Quartz. Rear / Foto: Joaquim Callén
Rear / Foto: Joaquim Callén
Gold with Quartz. Foto: Joaquim Callén
Foto: Joaquim Callén


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