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RM2836   Iowaite, var. chromium-bearing Iowaite, Stichtite, serpentine

Kaznakhtinskii massif, Ust-Koksinsky, Altai Republic, Russia

Compact mass of purple chromian iowaite with minor inclusions of greenish-brown serpentine. Iowaite is one of the former minerals on the locality and mostly replaced by stichtite, which forms a similar aggregates but is more light, lilac coloured.


Size: 7.6 x 4 x 2.7 cm.

 

RM2811   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: 4.2 x 3.4 x 3.2 cm.

 

RM2810   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: 4.7 x 4.5 x 3.9 cm.

Price: 55 €Buy
 

RM2809   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: 6 x 4.3 x 3.6 cm.
Main crystal: 3 x 2.2 cm.

 

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.

 

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.

 

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.

 

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).


 

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).
 

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).


 

RM2255   Johillerite

Tolbachik volcán, Northern Breakthrough, Great Fissure eruption, Kamchatka, Russia

Very interesting blue-violet to lavender aggregates of johillerite, on matrix, and accompanied by black hematite crystals. Johillerite is a extremelly rare arsenate with sodium, copper and magnesium+zinc: Na(Mg,Zn)3Cu(AsO4)3. Only three localities worldwide: Tsumeb (TL), slags from Genna (Germany) and the Tolbachik volcano in Kamchatka. Johillerite forms a continuous solid-solution system with badalovite and nickenichite. Johillerite samples were obtained from the fumaroles of the North Breach of the great fissure Tolbachik volcano eruption (1975-1976). Cone took 44 days to form.


Size: 4.5 x 3.2 x 3 cm.

 

RM2256   Shcherbakovite, Schizolite and Lamprophyllite

Rasvumchorr Mt, Khibiny, Murmansk Oblast, Russia

Aggregate of brown prismatic crystals of this rare niobium and tantalum silicate found in the alkaline pegmatites of the Khibiny Mountains, in this remote area of the Kola Peninsula. It is accompanied by pink aggregates of schizolite, an intermediate member of the pectolite-serandite series, and of lamprophyllite. Identified by Dr. D. Lisitsin.


Size: 5.6 x 3.8 x 2.8 cm.
Main crystal: 1.7 cm.

Price: 130 €Reserved

 

RM2228   Lorenzenite

Selsurt Mountain, Lovozersky, Murmansk Oblast, Russia

Lorenzenite is a rare sodium titanium silicate found in pegmatites and nepheline syenites. A lustrous, sharp, chocolate-brown crystals in matrix on this excellent specimen from the Joan Astor Collection.


Size: 4.5 x 4 x 3 cm.
Main crystal: 1.8 cm.
Found in 1994.

Col. Joan Astor.
 

RM2122   Native iron in basalt

Khungtukun Massif, Taimyr Peninsula, Khatanga, Taymyrskiy Autonomous Okru, Krasnoyarsk Krai, Russia

Slab of native iron in mafic matrix. Specimen is tilted so reflections of sunlight make iron stand out from matrix. This iron could be refered to kamacite variety (content in Ni, see the apple green tones). It is accompanied by fayalite-forsterite and labradorite. Probably some cohenite is present in the sample. One side polished, natural the other. Analisys will be send to the buyer.


Size: 4.8 x 3.7 x 0.9 cm.

Analyzed specimen with report


 

RM2124   Native iron in basalt

Khungtukun Massif, Taimyr Peninsula, Khatanga, Taymyrskiy Autonomous Okru, Krasnoyarsk Krai, Russia

Slab of native iron in mafic matrix. Specimen is tilted so reflections of sunlight make iron stand out from matrix. This iron could be refered to kamacite variety (content in Ni). It is accompanied by fayalite-forsterite and labradorite. Probably some cohenite is present in the sample. Both sides polished showing internal structures. Analisys will be send to the buyer.


Size: 4.9 x 3.5 x 0.5 cm.

Analyzed specimen with report


 

RM2108   Wiluite

Vilyui River Basin, Mirninsky, Sakha Republic, Russia

Doubly terminated wiluite floating crystal, a rare calcium, aluminum and magnesium silicate with boron. It presents two prisms of different order, the tetragonal dipyramid truncated by the pinacoid. With a interpenetrated crystal. Good size and deep green colour. Wiluite was accepted as a new species in 1997 belonging to the vesuvianite group. It comes from the type locality for the species.


Size: 2.4 x 2.2 x 1.9 cm.

Type Locality
 

RM2125   Wiluite

Vilyui River Basin, Mirninsky, Sakha Republic, Russia

Doubly terminated wiluite floating crystal, a rare calcium, aluminum and magnesium silicate with boron. It presents two prisms of different order, the tetragonal dipyramid truncated by the pinacoid. really good size and deep green colour. Wiluite was accepted as a new species in 1997 belonging to the vesuvianite group. It comes from the type locality for the species.


Size: 2.6 x 2.3 x 1.7 cm.

Type Locality
 

RM2126   Wiluite

Vilyui River Basin, Mirninsky, Sakha Republic, Russia

Doubly terminated wiluite floating crystal, a rare calcium, aluminum and magnesium silicate with boron. It presents two prisms of different order, the tetragonal dipyramid truncated by the pinacoid. Good size and deep green colour. Wiluite was accepted as a new species in 1997 belonging to the vesuvianite group. It comes from the type locality for the species.


Size: 2.3 x 1.8 x 1.7 cm.

Type Locality
 

RM2096   Clinochlore, seraphinite variety

Korshunovskoye iron deposit, Zheleznogorsk, Irkutsk Oblast, Russia

Aesthetic specimen of clinochlore, variety seraphinite, forming nodular masses of radiating crystals. Polished slabs such as this have become popular ornamental items. The varietal name seraphinite refers to Biblical angelic beings having three pairs of wings, and is a trade name referring to the fibrous, silvery crystals that compose it. One side is polished showing the internal structure; the other side is natural with this "curious" label...


Size: 7.2 x 4.8 x 1.5 cm.

Price: 55 €Buy
 

RM2119   Fluorapatite

Mine No. 2 (Phlogopite Quarry), Slyudyanka, Lake Baikal area, Irkutsk Oblast, Russia

On a calcite and quartz matrix sits an aesthetic, doubly terminated fluorapatite crystal with this nice blue color, with curious rounded faces and edges. The very glassy luster, translucent, color and size of this specimen make this a fine mineral specimen. This Russian fluorapatite specimens from this locality are highly appreciated for lustre and gemminess. Good size and very aerial disposed.


Size: 4.8 x 4.2 x 3.5 cm.
Main crystal: 4.5 x 2.2 cm.

 
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