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

Tantalite-(Fe)
Tantalite-(Fe). Front
Front
Tantalite-(Fe). Top
Top
Tantalite-(Fe)  

CT66AM1: Prismatic crystal with flat contacts at the back of the prism, parallel growths and polycrystalline formations with sharp terminal faces.
The specimen, from an old historical mine, comes from the Carles Curto collection, whose label and catalogue entry we will send to the buyer.
Big Boulder Mine, Larimer County, Colorado  USA

Specimen size: 2.5 × 2.1 × 1.3 cm = 0.98” × 0.83” × 0.51”

Former collection of Carles Curto (duplicates)



Order
Franklinite with Calcite
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)



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

Spain

Azurite with Quartz
Azurite with Quartz.
Azurite with Quartz  

CV11AJ7: Equant Azurite crystals with a thick lenticular shape. They are bright with a very intense color and are on matrix with Quartz crystals.
Berta Quarry, Can Domènech Hill, Roques Blanques Mountains, Sant Cugat del Vallès-El Papiol, Comarca Vallès Occidental / Baix Llobregat, Barcelona, Catalonia  Spain (05/1971)

Specimen size: 2 × 1 × 1.3 cm = 0.79” × 0.39” × 0.51”

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

Former collection of Carles Curto (duplicates)



Order

France

Azurite
Azurite  

CQ87AI5: Group, on matrix, of lenticular crystals, one of them clearly dominant, with very well defined faces and edges, bright with a color that is intense, very much more vivid than usual for the locality.
The sample is from the Carles Curto collection whose label and catalog card we’ll send to the buyer.
Chessy-les-Mines, Les Bois d'Oingt, Villefranche-sur-Saône, Rhône, Auvergne-Rhône-Alpes  France

Specimen size: 3.5 × 3 × 1.5 cm = 1.38” × 1.18” × 0.59”

Main crystal size: 2.4 × 1.4 cm = 0.94” × 0.55”

Former collection of Carles Curto (duplicates)



Azurite. Front
Front
Azurite. Rear
Rear
Order

Europe (excl. Spain and France)

Strontianite with Calcite
Strontianite with Calcite. Front
Front
Strontianite with Calcite. Side
Side
Strontianite with Calcite  

CP86AN1: Group of twinned Strontianite crystals with a prismatic habit and a clearly hexagonal outline, with excellent terminations, translucent, with bright luster and a light cream color, on matrix with Calcite.
The specimen comes from the Carles Curto collection, whose label and computer catalogue entry we will send to the buyer.
Oberdorf an der Laming, Laming valley, Bruck an der Mur, Styria/Steiermark  Austria

Specimen size: 4.9 × 4 × 2.9 cm = 1.93” × 1.57” × 1.14”

Main crystal size: 1.6 × 1.2 cm = 0.63” × 0.47”

Minor fluorescence long & short UV

Former collection of Carles Curto (duplicates)



Order
Opal (variety hyalite)
Opal (variety hyalite)  

CC10AI3: Clear and colorless botryoidal aggregate that is very bright, on matrix and is fluorescent with an UV lamp. A precursor of the current hyalites from Central Europe.
Valeč, Doupov, Karlovy Vary Region, Bohemia  Czech Republic

Specimen size: 4.2 × 3.4 × 2.6 cm = 1.65” × 1.34” × 1.02”

Fluorescent short UV

Former collection of Carles Curto (duplicates)



Opal (variety hyalite). Opal (variety hyalite).
Order
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)



Order
Chalcopyrite
Chalcopyrite  

CB14AL8: Aggregate of twinned disphenoidal (pseudotetrahedral) crystals of Chalcopyrite, with slight iridescence, on matrix.
The specimen from one of the most classic German localities for the species comes from the Carles Curto collection, whose label and catalogue entry we will send to the buyer.
Herdorf, Siegerland, Rhineland-Palatinate/Rheinland-Pfalz  Germany

Specimen size: 3.4 × 2.4 × 1.9 cm = 1.34” × 0.94” × 0.75”

Main crystal size: 2.2 × 1.7 cm = 0.87” × 0.67”

Former collection of Carles Curto (duplicates)



Chalcopyrite. Front
Front
Chalcopyrite. Rear
Rear
Order
Diopside with Grossular (variety hessonite)
Diopside with Grossular (variety hessonite). Diopside with Grossular (variety hessonite).
Diopside with Grossular (variety hessonite).

Recorded under neon light
Diopside with Grossular (variety hessonite)
 

CMB96AO0: Diopside as elongated crystals with sharp crystal forms, transparent, with good luster and an intense color. On matrix, with small crystals of Grossular (hessonite variety). A fine Italian classic.
Becchi delle Curbassere, Val d'Ala, Lanzo Valleys (Valli di Lanzo), Metropolitan City of Turin Province, Piedmont (Piemonte)  Italy

Specimen size: 4.8 × 4.2 × 3 cm = 1.89” × 1.65” × 1.18”

Main crystal size: 1.9 × 0.2 cm = 0.75” × 0.08”

Former collection of Carles Curto (duplicates)



Order
Quartz (variety prase)
Quartz (variety prase)  

CM13AM5: Group of elongated crystals of Quartz (variety prase), with good luster and a very deep color. A fine miniature. This piece comes from the Carles Curto collection (number 1972.07), whose label and computer file we will send to the buyer.
Porto Azzurro, Elba Island, Livorno Province, Tuscany  Italy (±1972)

Specimen size: 3.8 × 3.8 × 3.5 cm = 1.50” × 1.50” × 1.38”

Main crystal size: 2.4 × 0.5 cm = 0.94” × 0.20”

Former collection of Carles Curto (duplicates)



Quartz (variety prase). Quartz (variety prase).
Order
Aragonite
Aragonite. Front
Front
Aragonite. Top
Top

Recorded under neon light
Aragonite
 

CCB14AO5: Group of very sharp pseudohexagonal crystals of Aragonite, one of them clearly dominant, with very distinct channels and dissolution forms, translucent, and with a uniform snow-white color.
This specimen comes from the collection of Carles Curto (duplicates), whose label and computer file we will send to the buyer.
Cianciana Mines, Cianciana, Agrigento (Girgenti) Province, Sicily  Italy (±1976)

Specimen size: 5.5 × 4.0 × 2.6 cm = 2.17” × 1.57” × 1.02”

Main crystal size: 3.6 × 2.9 cm = 1.42” × 1.14”

Fluorescent long & short UV

Former collection of Carles Curto (duplicates)

€90 / US$92 / ¥12250 / AUD$132

Reservado
Mimetite (variety campylite) with Quartz

Recorded under neon light
Mimetite (variety campylite) with Quartz
 

CRT27AO8: Mimetite, as isolated crystals or small groups, almost spherical due to the strong curvatures of the faces and edges, with good luster and an intense and uniform yellow color, on a matrix of white Quartz crystals.
An English classic that comes from Carlos Curto's collection of duplicates (number 1983.31), whose label we will send to the buyer.
Dry Gill Mine, Caldbeck Fells, Allerdale, former Cumberland, Cumbria  England / United Kingdom (±1983)

Specimen size: 6.4 × 3.3 × 2.1 cm = 2.52” × 1.30” × 0.83”

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

Former collection of Carles Curto (duplicates)



Mimetite (variety campylite) with Quartz. Mimetite (variety campylite) with Quartz.
Order

Africa - Tsumeb

Africa

Bornite with Quartz
Bornite with Quartz. Bornite with Quartz.
Bornite with Quartz  

CR63AN1: Tristetrahedral Bornite crystal with sharp crystal forms, bright metallic luster and intense iridescence, on matrix, with Quartz.
This specimen comes from the Carles Curto collection, whose label and computer catalogue entry we will send to the buyer.
Bleida Mine, Tinzouline, Zagora Province, Drâa-Tafilalet Region  Morocco (±1980)

Specimen size: 3.7 × 2 × 1.7 cm = 1.46” × 0.79” × 0.67”

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

Former collection of Carles Curto (duplicates)

€80 / US$81 / ¥10890 / AUD$117

Reservado
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)



Malachite xx with Dolomite and Quartz. Malachite xx with Dolomite and Quartz.
Order

Tsumeb

Wulfenite
Wulfenite. Wulfenite.
Wulfenite  

CB59AL8: Very sharp lamellar crystals of Wulfenite with notably distinct dipyramid faces, great luster and a color between yellow and cream. On matrix.
The specimen, from one of the most classic localities for the species, comes from the Carles Curto collection whose label and catalogue entry we will send to the buyer.
Tsumeb Mine, Tsumeb, Otjikoto Region  Namibia

Specimen size: 4.6 × 3.1 × 2.1 cm = 1.81” × 1.22” × 0.83”

Main crystal size: 0.9 × 0.8 cm = 0.35” × 0.31”

Former collection of Carles Curto (duplicates)



Order

Brazil

Elbaite (variety verdelite)

Recorded under neon light
Elbaite (variety verdelite)
 

CMP68AO1: Doubly terminated floater crystal of Elbaite (verdelite variety) with very flattened shapes and transparent. With great luster and an intense and uniform green color.
Governador Valadares, Vale do Rio Doce, Minas Gerais  Brazil

Specimen size: 7.3 × 0.7 × 0.3 cm = 2.87” × 0.28” × 0.12”

Former collection of Carles Curto (duplicates)



Elbaite (variety verdelite). Front
Front
Elbaite (variety verdelite). Rear
Rear
Elbaite (variety verdelite). Top
Top
Order

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)



Order
Paravauxite
Paravauxite  

MV14AH4: Very sharp Paravauxite crystals on a rock matrix. The crystals are pearly white, translucent and very bright. The sample is from the type locality for the species. We’ll send to the buyer the original label and also a copy of the computer card with the full text in the collection catalog.
Siglo Veinte Mine, Llallagua, Rafael Bustillo Province, Potosí Department  Bolivia

Specimen size: 4.6 × 4.1 × 1.6 cm = 1.81” × 1.61” × 0.63”

Main crystal size: 0.6 × 0.1 cm = 0.24” × 0.04”

Former collection of Carles Curto (duplicates)

€110 / US$112 / ¥14980 / AUD$161

Paravauxite. Paravauxite.
Reservado
Franckeite with Stannite and Zinkenite
Franckeite with Stannite and Zinkenite. 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)



Order

Asia - Australia

Pakistan - Afghanistan

Dravite with Muscovite

Recorded under neon light
Dravite with Muscovite
 

CCF46AO0: Isolated Dravite crystals with a flattened bipyramidal shape, with perfectly sharp crystal forms, translucent, with good luster and a nice brown color with orange tones, on a Muscovite matrix.
Sar-e Sang, Koksha Valley, Khash & Kuran Wa Munjan Districts, Badakhshan Province  Afghanistan (±2011)

Specimen size: 4.0 × 5.6 × 2.3 cm = 1.57” × 2.20” × 0.91”

Main crystal size: 1.2 × 1.1 cm = 0.47” × 0.43”

Former collection of Carles Curto (duplicates)



Dravite with Muscovite. Dravite with Muscovite.
Order

Australia

Silver
Silver. Front / Photo: Joaquim Callén
Front / Photo: Joaquim Callén
Silver. Rear / Photo: Joaquim Callén
Rear / Photo: Joaquim Callén
Silver. Detail / Photo: Joaquim Callén
Detail / Photo: Joaquim Callén

Recorded under neon light
Silver
 

CTB48AO0: Dendritic growth of extremely elongated Silver crystals, with good terminations and, as a whole, a very attractive aesthetic, as is often the case with pieces from this deposit. An old Australian classic of excellent quality.
Endeavor Mine (Elura Mine), Cobar, Robinson County, New South Wales  Australia

Specimen size: 6.2 × 4.7 × 0.8 cm = 2.44” × 1.85” × 0.31”

Main crystal size: 4.8 × 0.3 cm = 1.89” × 0.12”

Former collection of Carles Curto (duplicates)



Order


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