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RM2775   Fluorite and quartz

Nikolaevskiy Mine, Dalnegorsk, Kavalerovo area, Primorskiy Kray, Russia

Dalnegorsk fluorite specimens are very difficult to photograph. This is the case of this piece formed by groups of cubic crystals, transparent, colorless, defined, with the edges of the cube beveled by the dodecahedron and inclusions of very curious shapes. It is accompanied by quartz crystals dotted with green chlorite. A very curious piece ...


Size: 6.8 x 4.4 x 4.3 cm.
Main crystal: 2.4 x 1.9 cm.

Price: 200 €Buy
 

RM2724   Prase quartz and andradite

Sinerechenskoe skarn, Primorsky Krai, Russia

Group of prase quartz crystals, with good luster, very well defined and contrasting on a matrix covered by andradite crystals. A very aesthetic piece.


Size: 5.7 x 3.7 x 3 cm.

Price: 100 €Buy
 

RM2725   Prase quartz, andradite and hedenbergite

Sinerechenskoe skarn, Primorsky Krai, Russia

Doubly terminated crystal of prase quartz, with a very good size. It shows an intense green color and polycrystalline growths on the faces of the prism. Very aerial and esthetic specimen on a matrix rich in small andradite crystals and green hedenbergite needles. A very aesthetic piece.


Size: 7.6 x 7 x 5.7 cm.
Main crystal: 5.9 cm.

Price: 130 €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
 

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


 

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).


 

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


 

RM2595   Prehnite

Pune, Maharashtra, India

Globular aggregates of brilliant prehnite crystals, with a very uniform green hue.


Size: 7 x 3.8 x 3.3 cm.
Found in ±2004

Col. A. Trigo (Mataró).


Price: 40 €Buy
 

RM2605   Sulphur and calcite

Vodinskoe deposit, Samara Oblast, Russia

This is an exceptional sulphur specimen, both for this Russian mine and for the perfection of the crystals. In a cavity of the matrix several very well defined and doubly terminated crystals of sulphur are disposed, clearly showing the dipyramidal faces of different orders. With brilliance, translucent to transparent. With another group of crystals, one of them predominant, on sample side. On a matrix with scalenohedral calcite crystals. Specimens of this mine and with this fine quality are more than difficult to see. A sample from the Astor collection (Barcelona). You can find more information about this locality at geo.web.ru.


Size: 6.6 x 6.5 x 5.2 cm.
Main crystal: 1.4 cm.
Found in ±1998

Col. Joan Astor (Barcelona).
 

RM2542   Gyrolite and quartz

Malad Quarry, Malad, Mumbai, Maharashtra, India

Globular gyrolite aggregates, formed by radial crystals, brilliant, olive green in color. They are disposed on a matrix partially covered with quartz crystals. It belongs to the collection of Joan Astor, with a handwritten label and another typewritten.


Size: 9.7 x 4.6 x 3.8 cm.
Main crystal: 2 cm. aggreg.
Found in ±1977.

Col. J. Astor, Barcelona.


 

RM2497   Aluminium

Bulla Island, Caspian Sea, Gobustan, Azerbaijan

Small particles containing grains of native aluminum, an extreme rarity. In the images we can see that they are associated with magnetite. They most likely contain akdalaite, an oxide hydroxide of aluminum, which we have not confirmed due to the limitations of the electron microscopy technique. We will send report to the buyer.
The Bulla or Boulla is a mud volcano on the island of the same name, in the Baku archipelago, a few km SE of the city of Baku. The most intense eruptions occurred in 1857 and 1940, when erupting breccia volumes reached a few million cubic meters. The most interesting mineralization (native metals, akdalaite) is related to the ejection of the 1947 eruption.


Size: 1.8 x 1 mm.

Analyzed specimen with report


Price: 95 €Buy
 

RM2401   Stilbite-Ca and Fluorapophyllite-(K)

Wagholi Quarries, Wagholi, Poonah, Maharashtra, India

This sample shows various aggregates of lanceolate tabular stilbite crystals, with luster and transparence. They are disposed on an upholstered matrix of small crystals of the same species and prismatic crystals, slightly greenish and transparent, of fluorapophyllite- (K).


Size: 9.5 x 7.3 x 4.5 cm.
Main crystal: 2.2 cm.
Found in ca. 1986.

Col. J. Astor (Barcelona).
Classic locality


Price: 45 €Buy
 

RM2486   Gurimite

Gurim anticline, Hatrurim, Tamar, HaDarom, Israel

Gurimite is a very rare and chemically simple species. It is a barium vanadate, but in this sample we can observe the presence of P, very common on V minerals. This sample is from the type locality, the Gurim Anticline, in Israel. Aproved in 2013 and published in 2017. Specimen analyzed by Dr. M. Murashko. IMA2013-032. For extrem systematic collectors...


Size: 1.1 x 0.9 x 0.4 cm.

Ex. M. Murashko specimen.
Analyzed specimen with report


 

RM2447   Belomarinaite

Fissure Tolbachik Eruption 2012-2013, Plosky Tolbachik volcano, Tolbachik volcano, Kamchatka Krai, Russia

Extraordinary translucent laminar specimen of belomarinaite, an extremely rare sodium and potassium sulphate, of good size and with clearly visible crystalline forms. It refers to both chemistry and structure to aphthitalite. These sulfates are formed in saline deposits and in volcanic fumaroles, as is this case. This specimen comes from the type locality for the species. A unique opportunity for systematic collectors.


Size: 2 x 1.2 x 0.1 cm.
Found in ca. 2017.

Ex. M. Murashko specimen.
Type Locality
 

RM2444   Alumoåkermanite

Turii alkaline Massif, Turii Cape, Murmansk Oblast, Russia

Specimen of alumoåkermanite (IMA2008-049) from the pegmatites of the Kola peninsula. Honey coloured. It is probably accompanied by species such as cebollite and juanite those form a whitish vein. A very rare species, very visible in the polished section. Good size. It comes from the southern part of the Kola Peninsula.


Size: 3.5 x 3.1 x 1.9 cm.

 

RM2445   Bementite

Parnokskoye deposit, Komi Republic, Russia

Bementite is a very rare manganese silicate, identified in the well-known Franklin mine (NJ, USA), where it has its type locality. This specimen comes from a mining area located in the central zone of the Pre-polar Urals, known for the manganese, rhodonite and magnetite mines. In this specimen we can observe aggregates of crystals with golden tones that stand out on the matrix. An opportunity for systematic collectors.


Size: 3.4 x 2.5 x 2.4 cm.

Price: 45 €Reserved
 

RM2440   Wadeite and aegirine

Kukisvumchorr Mt, Kola Peninsula, Khibiny Massif, Murmanskaja Oblast', Northern Region, Russia

Excellent specimen of this rare potassium and zirconium silicate. It shows rich aggregates of hexagonal crystals, transparent to translucent, with an excellent brilliance. Colourless to slightly violet.They are disposed on a matrix of acicular aegirine crystals with a very dark green color, almost black. The Kukisvumchorr Mountains are in the central part of the Khibiny Massif. The area has a very interesting mineralogy, notable for its nepheline syenites.


Size: 4.2 x 3.5 x 2.8 cm.
Main crystal: 3 mm.

 

RM2482   Opal

Urals, Russia

Very glassy opal specimen, with excellent transparency and yellowish bands. From an unusual area of Russia for this variety of quartz. It was acquired by A. Trigo (Mataró) in 1983, in Expominer Mineral Show (Barcelona).


Size: 4.5 x 3.9 x 1.5 cm.
Found in ca. 1983

Col. Antonio Trigo (Mataró).


 

RM2484   Calcite (glendonite variety) pseudomorph after ikaite

Olenitsa River, Kola, Murmansk Oblast, Russia

Glendonite is the name given to the pseudomorphic calcite after ikaite. Ikaite, a hexahydrated calcium carbonate, was first observed in nature in the 1960s, at the seabed of the Ikka Fjord in Greenland. There, it precipitates due to the mixture of cold water submarine springs (3°C) rich in carbonates with seawater. Ikaite deposits are not usually found due to its poor stability, however, sometimes the rapid conversion of ikaite to calcite and water results in the generation of pseudomorphic calcite aggregates in the shape of the ikaite crystal (so-called glendonites). These calcite pseudomorphs directly replace ikaite above 4ºC.


Size: 6.1 x 2.2 x 1.7 cm.
Found in ca. 1995.

Col. Antonio Trigo (Mataró).


 

RM2428   Zunyite

Qualat-e-Balat salt dome, Bandar Abbas, Hormozgan, Iran

Two interpenetrating zunyite crystals, one of them dominant. Its color is due to hematite inclusions. With the shape of a tetrahedron truncated by the faces of the cube. The edge of the tetrahedron measures 12 mm. An interesting specimen for systematic collectors and crystallography lovers. A rare species, it is an aluminum sorosilicate with fluorine and chlorine. We carried out an X-ray diffraction and fluorescence studies that confirmed the species. We recommend an interesting article about the deposit in the magazine Rocks and Minerals (Vol. 95, nº 2, 2020).


Size: 1.2 x 1.1 x 1.1 cm.
Main crystal: 12 mm edge/arista.

Analyzed specimen with report


 

RM2430   Zunyite

Qualat-e-Balat salt dome, Bandar Abbas, Hormozgan, Iran

A floating zunyite crystal. Its color is due to hematite inclusions. With the shape of a tetrahedron truncated by the faces of the cube. The edge of the tetrahedron measures 13 mm. An interesting specimen for systematic collectors and crystallography lovers. A rare species, it is an aluminum sorosilicate with fluorine and chlorine. We carried out an X-ray diffraction and fluorescence studies that confirmed the species. We recommend an interesting article about the deposit in the magazine Rocks and Minerals (Vol. 95, nº 2, 2020).


Size: 1.2 1.1 x 1 cm.
Main crystal: 12 mm edge/arista.

Analyzed specimen with report


 

RM2431   Zunyite

Qualat-e-Balat salt dome, Bandar Abbas, Hormozgan, Iran

Two interpenetrating zunyite crystals, one of them dominant. Its color is due to hematite inclusions. With the shape of a tetrahedron truncated by the faces of the cube. The edge of the tetrahedron measures 11 mm. The small one has a nick in one vertex. An interesting specimen for systematic collectors and crystallography lovers. A rare species, it is an aluminum sorosilicate with fluorine and chlorine. We carried out an X-ray diffraction and fluorescence studies that confirmed the species. We recommend an interesting article about the deposit in the magazine Rocks and Minerals (Vol. 95, nº 2, 2020).


Size: 1.2 x 1 x 1 cm.
Main crystal: 10 mm. edge/arista

Analyzed specimen with report


 

RM2429   Zunyite

Qualat-e-Balat salt dome, Bandar Abbas, Hormozgan, Iran

Two interpenetrating zunyite crystals, one of them dominant. Its color is due to hematite inclusions. With the shape of a tetrahedron truncated by the faces of the cube. The edge of the tetrahedron measures 11 mm. An interesting specimen for systematic collectors and crystallography lovers. A rare species, it is an aluminum sorosilicate with fluorine and chlorine. We carried out an X-ray diffraction and fluorescence studies that confirmed the species. We recommend an interesting article about the deposit in the magazine Rocks and Minerals (Vol. 95, nº 2, 2020).


Size: 11 x 10 x 10 mm.
Main crystal: 10 mm. edge/arista

Analyzed specimen with report


 

RM2432   Zunyite and hematite

Qualat-e-Balat salt dome, Bandar Abbas, Hormozgan, Iran

Very sharp single zunyite crystal with good luster, coloured by red hematite inclusions and with some small brilliant foliaceous hematite partially included in faces. On a minor matrix. Clean tetrahedron form, truncated by cubic faces. Tetrahedron edge is 12 mm. A good sized and nice crystallographic specimen of this unusual species, a rare sorosilicate of aluminum and chlorine, with fluorine. Analized by X-ray difraction and X-ray fluorescence.


Size: 1.7 x 1.3 x 1.3 cm.
Main crystal: 12 mm edge.

Analyzed specimen with report


 

RM2433   Zunyite and hematite

Qualat-e-Balat salt dome, Bandar Abbas, Hormozgan, Iran

Group of zunyite crystals on matrix, interpenetrated, brilliant and with cube faces truncating the edges of the tetrahedron. Its intense color is due to hematite inclusions. The edge of the major tetrahedron is 12 mm. A good size crystallographic specimen of this mineral species, a rare aluminum chlorine sorosilicate with fluorine. Analyzed by fluorescence and X-ray diffraction.


Size: 2.6 x 1.5 x 1.2 cm.
Main crystal: 12 mm edge.

Analyzed specimen with report


 
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