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RM2682   Skutterudite and calcite

Bou Azzer, Tazenakht, Ouarzazate, Souss-Massa-Draâ, Morocco

Group of skutterudite crystals, intense luster and well defined faces and edges, showing cube, octahedron and dodecahedron shapes. They are accompanied by white calcite with which they contrast. It belongs from this classic Moroccan mine and from the Joan Astor collection.


Size: 5.2 x 4.1 x 2.8 cm.
Main crystal: 7 mm.
Found in ± 1976.

Col. Joan Astor (Barcelona).


Price: 60 €Buy
 

RM2681   Graphite

Radigara, Ratnapura, Sabaragamuwa, Sri Lanka

Although the label of this specimen places the piece in Mozambique, we have no record of graphite specimens similar to this one in this African country. For another specimen from the same collection (Joan Astor) we can place it in the classical sites of the Ratnapura area, in Sri Lanka. Fibrous crystals with luster. More information can be found in the file of the specimen RM1836 [click here]. Very interesting classic.


Size: 5 x 4 x 2.5 cm.
Found in ± 1975.

Col. Joan Astor (Barcelona).
Classic locality


Price: 75 €Buy
 

RM2680   Andradite, var. melanite

California State Gem Mine, New Idria Mining District, Santa Rita Peak, San Benito Co., California, United States

Brilliant black andradite crystals, var. melanite, on contrasting light matrix. Well defined faces and edges. Very aerial. From the former Joan Astor collection (Barcelona).


Size: 4.8 x 2.2 x 1.4 cm.
Found in ± 1976.

Col. Joan Astor (Barcelona).
Classic locality


Price: 45 €Buy
 

RM2679   Enstatite

Odegården apatite mines, Bamble, Vestfold og Telemark, Norway

A very hard to find enstatite specimen from the Ødegården apatite mines. Prismatic crystal of dark greenish-brown, partially transformed to talc. Accompanied by muscovite. During the 2nd World War, the mines were worked from 1941-1945 under the leadership of Adam Petterson. The mines are now closed and most of the dumps are overgrown by forest. Some of the dumps have been used as masses in construction and reparations of roads in the district.


Size: 5 x 2.3 x 2.2 cm.
Found in ± 1975.

Col. Joan Astor (Barcelona).
Classic locality


 

RM2678   Pyrolusite and goethite

Sagides, Arcos de Jalón, Soria, Castilla y León, Spain

Pyrolusite specimens from Sagides (Soria) are rare on the market. In this specimen we can see bright aggregates of fine prismatic pyrolusite crystals. They are partially covering a goethite matrix.


Size: 5.5 x 4 x 2.5 cm.
Found in ± 1975.

Col. Joan Astor (Barcelona).


Price: 50 €Buy
 

RM2677   Corundum, var. ruby

Mysore corundum deposits, Mysore, Karnataka, India

Classic ruby crystals, with an intense purple color, arranged in a quartz-rich matrix. Especially rich and aesthetic specimen from India. The crystals are sharp, bright and translucent. They fluoresce under UV light. Former Joan Astor Collection.


Size: 6.8 x 4.3 x 4 cm.
Main crystal: 1.3 cm.
Found in ± 1976.

Col. Joan Astor (Barcelona).
Fluorescent under long wave UV


 

RM2676   Native copper

New Cornelia Mine, Little Ajo Mountains, Ajo, Pima Co., Arizona, United States

Arborescent specimen of native copper, formed by numerous sharp crystals, with excellent luster and intense color. The piece is from the Joan Astor collection and dates from the early 70s.


Size: 5 x 3.8 x 1.4 cm.
Found in ± 1973.

Col. Joan Astor (Barcelona).
Classic locality


Price: 60 €Buy
 

RM2675   Axinite-(Fe)

Cime du Cornillon, Bourg d'Oisans, Isère, Rhône-Alpes, France

Group of sharp tabular axinite-(Fe) crystals from this classic French locality. Brilliant, transparent to translucent. The piece belongs from the Joan Astor collection and dates from the late 70s.


Size: 5.7 x 5.2 x 2.2 cm.
Found in ± 1977.

Col. Joan Astor (Barcelona).
Classic locality


Price: 45 €Buy
 

RM2673   Rutile with kyanite, hematite-goethite

Graves Mountain, Lincoln Co., Georgia, United States

These specimens are very rare in this classic locality for the rutile. The matrix is formed by interpenetrating tabular kyanite crystals coated with iridescent shades of 'turgite', a term used for the mixture of goethite and hematite. What is remarkable is a group of rutile crystals, very bright and well defined. A piece with history.


Size: 5.6 x 4.6 x 3.9 cm.
Main crystal: 1 cm.
Found in ± 1977.

Col. Joan Astor (Barcelona).
Classic locality


 

RM2672   Achtaragdite, hydrogrossular-chlorite-carbonate pseudomorph

Akhtaragda River mouth, Vilyui River Basin, Mirninsky, Sakha Republic, Russia

Achtaragdite is a unique, rare and poorly understood pseudomorph, from this remote Siberian locality that is the Type Locality for grossular garnet. It is a variety of the grossular-hibschite garnet series and is (technically, according to mindat) a hydrogrossular-chlorite-carbonate pseudomorph after what was formerly considered to be wadalite or some other rare hydrogarnet. The real precursor mineral for these pseudomorphs is now considered to be helvite.


Size: 3.8 x 3.3 x 2 cm.
Found in ± 1976.

Col. Joan Astor (Barcelona).


 

RM2671   Andalusite

Cap de Creus, Cadaqués - El Port de la Selva, Girona, Catalunya, Spain

Andalusite specimen from Cap de Creus (Cape), with pink tones and quite crystalline. The Cap de Creus Natural Park was the first maritime-terrestrial park in Catalonia. It was created in 1998 and protects a large part of the Cap de Creus peninsula. Currently totally prohibited to collect minerals in this area.


Size: 6 x 3.4 x 2.8 cm.
Found in ± 1976.

Col. Joan Astor (Barcelona).
Classic locality


 

RM2670   Opal with dendrites

Monto Outcrop, North Burnett Region, Queensland, Australia

Very bright opal from this Australian locality, with orange colors, the elongated dendrites of pyrolusite give it an aesthetic touch. This locality is formed by basaltic rocks over an area of more than 1000 km², most of them north and south of the Dawes mountain range. The main period of volcanic activity was at c. 25Ma. Acquired by Joan Astor from the well-known Jaume Serrate (Terrassa), whom we could describe as a "craftsman" of minerals.


Size: 6.2 x 4.5 x 3.3 cm.
Found in ± 1977.

Col. Joan Astor (Barcelona).


 

RM2669   Orthoclase, Moonstone var.

Meetiyagoda, Galle, Southern Province, Sri Lanka

This locality is known for its production of "moonstone", extracted from altered pegmatites. It is an unpolished specimen, very crystalline, translucent, with slightly greenish tones, and a very characteristic light effect called adularescence. Thin alternating layers of orthoclase and albite create the light interference in this material that is responsible for this effect. Moonstone is a feldspar close to orthoclase and microcline.


Size: 5.2 x 3.1 x 1.6 cm.
Found in ± 1977.

Col. Joan Astor (Barcelona).
Fluorescent under long wave UV


 

RM2667   Celestite and calcite

Tossal Gros quarry, Ivorra, Lleida, Catalunya, Spain

Another well-known locality for celestite specimens in La Segarra (Lleida) is the Tossal Gros quarry (Can Fontanella or Roca quarry). Oligocene lacustrine marls, marly limestones and limestones containing geodes with diagenetic celestite. The grayish matrix is very characteristic. The prismatic, acute crystals, between transparent to translucent, are disposed in the cavities of the marl rock. They are accompanied by calcite crystals. A classic of Catalan mineralogy.


Size: 12 x 9.6 x 4.5 cm.
Main crystal: 1.1 cm.
Found in ca. 1980's.

Classic locality
Price: 55 €Buy
 

RM2666   Celestite and calcite

Tossal Gros quarry, Ivorra, Lleida, Catalunya, Spain

Another well-known locality for celestite specimens in La Segarra (Lleida) is the Tossal Gros quarry (Can Fontanella or Roca quarry). Oligocene lacustrine marls, marly limestones and limestones containing geodes with diagenetic celestite. The grayish matrix is very characteristic. The prismatic, acute crystals, between transparent to translucent, are disposed in the cavities of the marl rock. They are accompanied by calcite crystals. A classic of Catalan mineralogy.


Size: 12 x 9.3 x 5.2 cm.
Main crystal: 1.2 cm.
Found in ca. 1980's.

Classic locality
Price: 55 €Buy
 

RM2668   Celestite and calcite

Costa de l'Aguda, Torà, Lleida, Catalunya, Spain

Rich group of celestite crystals, bright, with transparence and a characteristic bluish tone. They are disposed on a marl matrix upholstered with calcite crystals. This specimen belongs to the first outcrop of the Costa de l'Aguda, in Torà (Lleida).


Size: 12 x 9.2 x 5.7 cm.
Main crystal: 2 cm.
Found in ca. 1980's.

Classic locality
 

RM2665   Celestite, calcite after celestite

Costa de l'Aguda, Torà, Lleida, Catalunya, Spain

A good size nodule of celestite from this classic Catalan locality. Well defined prismatic crystals, some brilliant, some of them partially replaced by calcite, also observing calcite perimorphosis, hollow prismatic crystals, some of them with corroded celestite remaining. This specimen is interesting for this substitution. The vug is covered with calcite crystals. This specimen belongs to the first outcrop of the Costa de l'Aguda, close to the town of Torà, Lleida.


Size: 13.5 x 9.6 x 5.5 cm.
Main crystal: 2.1 cm.
Found in ca. 1980's.

Classic locality
 

RM2655   Quartz (amethyst var.) and fluorite

Sant Marçal (Matagalls) mines, Sant Marçal, Massís del Montseny, Viladrau, Girona, Catalunya, Spain

Very "brilliant" specimen in the shape of a druse, with a pegmatitic matrix, accompanied by yellow fluorite crystals and upholstered with really brilliant quartz crystals, with an amethyst tone. These specimens were a rarity then and today.

The Sant Marçal mines (also known as Matagalls) are located in the Montseny massif, on the eastern slope of the Matagalls peak (1,700m). The works are between about 1,250 to 1,350 m of altitude. The municipal term corresponds to Viladrau. Mining in this type of deposits in this area and surrounding areas has focused on the extraction of minerals of Pb, Zn, F and Ba. Together with the Osor and Tagamanent deposits, the Rigròs vein of Sant Marçal mines is one of the most important in terms of the extraction of fluorite. Mines were operated until the mid-1990s and have been partially restored. Currently this area belongs to the Montseny Natural Park, so the collection of specimens is totally prohibited.

 


Size: 8.2 x 7.7 x 3 cm.
Main crystal: 9 mm.
Found in ca. 1970's.

Classic locality
Price: 70 €Buy
 

RM2638   Fluorite with quartz (amethyst var.)

Sant Marçal (Matagalls) mines, Sant Marçal, Massís del Montseny, Viladrau, Girona, Catalunya, Spain

Good sized specimen formed by a druse of cubic fluorite crystals with a yellow, slightly greenish, color. Translucent and with color zoning on some edges. They are partially covered by aggregates of quartz crystals with a soft amethyst tone. These specimens were a classic of this mine, but many years ago. These mines were operated until the mid-1990s and have been partially restored. Currently this area belongs to the Montseny Natural Park, so the collection of specimens is totally prohibited.


Size: 11 x 7.4 x 4 cm.
Main crystal: 1.9 cm.
Found in ca. 1970's.

Classic locality
 

RM2649   Andradite, andradite-grossular

Fra Joan area, Costabona Mt., Setcases, Girona, Catalunya, Spain

Group of andradite crystals with the dominant forms of the dodecahedron. Intense color and good size. Partially corroded by fluids. Specimens from this mine have been analyzed indicating that it is andradite, although zonation with grossular cannot be discarded. Included in the matrix we can see some scheelite crystals. The Fra Joan area is a classic of Catalan mineralogy, located at an altitude of more than 1,600 m, a mineralization associated with a skarn. Specimens of this size are difficult to find.


Size: 8.6 x 6.7 x 5.5 cm.
Main crystal: 1.6 cm.
Found in ca. 1980's.

Classic locality
 

RM2648   Andradite, andradite-grossular

Fra Joan area, Costabona Mt., Setcases, Girona, Catalunya, Spain

Group of andradite crystals with the dominant forms of the dodecahedron. Intense color and good size. Partially corroded by fluids. Specimens from this mine have been analyzed indicating that it is andradite, although zonation with grossular cannot be discarded. Included in the matrix we can see some scheelite crystals. The Fra Joan area is a classic of Catalan mineralogy, located at an altitude of more than 1,600 m, a mineralization associated with a skarn. Specimens of this size are difficult to find.


Size: 7.5 x 7 x 4.8 cm.
Main crystal: 1.5 cm.
Found in ca. 1980's.

Classic locality
 

RM2647   Grossular-Andradite and scheelite

Roca del Turó (Turón) mine, Costabona Mt., Espinavell, Molló, Girona, Catalunya, Spain

Group of andradite crystals with the dominant forms of the dodecahedron, although we can observe some edges finely beveled by the trapezohedron. Intense color and luster. Specimens from this mine have been analyzed indicating that it is andradite, this specimen is mainly grossular. It is accompanied by small octahedral scheelite crystals of a white color, highly fluorescent under SW-UV light. The Roca del Turó mine is a classic of Catalan mineralogy, located at an altitude of more than 1,600 m, that mined a mineralization associated with a skarn. Specimens of this size are difficult to find.


Size: 7.2 x 3 cm.6.7 x
Main crystal: 1.1 cm.
Found in ca. 1980's.

Fluorescent under short wave UV


 

RM2646   Andradite

Roca del Turó (Turón) mine, Costabona Mt., Espinavell, Molló, Girona, Catalunya, Spain

Group of andradite crystals with the dominant forms of the dodecahedron, although we can observe some edges finely beveled by the trapezohedron. Intense color and luster. Specimens from this mine have been analyzed indicating that it is andradite, although zonation with grossular cannot be discarded. Included in the matrix we can see some scheelite crystals. The Roca del Turó mine is a classic of Catalan mineralogy, located at an altitude of more than 1,600 m, that mined a mineralization associated with a skarn. Specimens of this size are difficult to find.


Size: 7.2 x 6.2 x 3.7 cm.
Main crystal: 14 mm.
Found in ca. 1980's.

Classic locality
 

RM2645   Andradite and quartz

Fra Joan area, Costabona Mt., Setcases, Girona, Catalunya, Spain

Group of good size andradite crystals with the dominant forms of the dodecahedron. Intense color and with quartz crystals. Specimens from this mine have been analyzed indicating that it is andradite, although zonation with grossular cannot be discarded. The Fra Joan area is a classic of Catalan mineralogy, located at an altitude of more than 1,600 m, a mineralization associated with a skarn. Specimens of this size are difficult to find.


Size: 6 x 5.5 x 3.2 cm.
Main crystal: 1.5 cm.
Found in ca. 1980's.

Classic locality
 

RM2641   Andradite

Roca del Turó (Turón) mine, Costabona Mt., Espinavell, Molló, Girona, Catalunya, Spain

Group of andradite crystals with the dominant forms of the dodecahedron, although we can observe some edges finely beveled by the trapezohedron. Intense color and luster. Specimens from this mine have been analyzed indicating that it is andradite, although zonation with grossular cannot be discarded. Included in the matrix we can see some scheelite crystals. The Roca del Turó mine is a classic of Catalan mineralogy, located at an altitude of more than 1,600 m, that mined a mineralization associated with a skarn. Specimens of this size are difficult to find.


Size: 5.1 x 3.7 x 4.3 cm.
Main crystal: 1.8 cm.
Found in ca. 1980's.

Classic locality
 
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