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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
 

RM2147   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. Tetrahedron form, truncated by cubic faces. Tetrahedron edge is 14 mm. A good sized and perfect 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: 1.4 x 1.4 x 1.3 cm.
Found in 2018.

Analyzed specimen with report


 

RM2146   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. Very clean tetrahedron form, truncated by cubic faces. Tetrahedron edge is 17 mm. A good sized and perfect 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: 1.6 x 1.6 x 1.5 cm.
Found in 2018.

Analyzed specimen with report


 

RM2109   Kasolite and guilleminite

Musonoi Mine, Kolwezi, Katanga, Congo, Democratic Republic of

In my opinion, among all known radioactive minerals, kasolite is the most aesthetic. It presents forms of elongated to tabular prisms, very well defined and sharp, many of them doubly terminated and of intense yellow color, even with some transparency. It is accompanied by guilleminite crystals of yellowish color. The matrix is partially covered by brilliant malachite. A aesthetic sample from a classic locality, to be observed with attention.


Size: 6.5 x 4.5 x 4 cm.
Main crystal: 1.5 mm

Excol. F. Coune (Belgium).
Presents radioactive activity.
 

RM2105   Spinel

Green Monster Mountain, Prince of Wales Island, Ketchikan Mining District, Prince of Wales-Hyder Census Area, Alaska, United States

Rich specimen formed by numerous spinel crystals showing octahedral form, black colour, very brilliant and well defined faces and edges. Sample is accompanied by the label of Douglas "Doug" Toland, with notes those indicates it could be gahnite or chromite, but the semi-quantitative analysis done with SEM-EDS microscopy shows that it is spinel, not identified in the mine before. It is accompanied by probably grossular and chlorite. A good specimen for the species and for this cold locality.


Size: 4.8 x 4.7 x 4.5 cm.
Main crystal: 4 mm.
Found in 1977.

Ex. Douglas Toland.
Analyzed specimen with report


Price: 80 €Reserved

 

RM2106   Volkovskite

Boulby Mine, Loftus, North Yorkshire, England, United Kingdom

Group of volkovskite crystals in parallel growth, colorless, transparent, with inclusions of hilgardite providing a bit of red color to the edges. This specimen comes from a finding that was recovered by a worker in the mine a years ago. Volkovskite is a very rare potassium and calcium chloroborate. Specimens of this size are very rare. Undoubtedly it is the best locality. We have analyzed by SEM-EDS this sample and we will send the results to the buyer.


Size: 4 x 2.2 x 0.4 cm.

Analyzed specimen with report


 

RM2107   Betafite (of Hogarth 1977), variety of Pyrochlore

Ambatofotsy pegmatite, Mahavelona, Soavinandriana, Antananarivo, Madagascar

A huge size crystal of betafite showing defined octahedral faces (triangular) and developed dodecahedral ones. Very interesting for its crystallography and species. An oldie, classic and representative for the species. This specimen belonged to the collection of Peraud-Pregilbert (France).
Although the term betafite was discredited in 2010, many of us still are using this term to define this mineral when we see it. Our specimen is an uranium, calcium, titanium and niobium/tantalum oxide with radioactive activity. Currently the betafite is included as a variety within the pyrochlore supergroup. As a note, the rich uranium term has been only found in the Moon (oxyuranobetafite).


Size: 2.8 x 2.5 x 2.2 cm.
Found in 1960's.

Presents radioactive activity.
 

RM2137   Betafite (of Hogarth 1977), variety of Pyrochlore

Silver Crater Mine, Basin Property, Faraday Township, Hastings Co., Ontario, Canada

Group of interpenetrated betafite crystals of good size that show the most developed faces of the dodecahedron. Interesting crystallography. It is accompanied by zircon crystals. These mottled-brown isometric crystals are from the well-known Silver Crater Mine at Bancroft. This is an excellent and uncommon example, today. Most specimens of this quality came out in the 1950s, during the active mining period. An old, classic and essential piece in any collection. This specimen bears the label of Tysons', a Canadian mineral dealer.
Although the term betafite was discredited in 2010, many of us still are using this term to define this mineral when we see it. Our specimen is an uranium, calcium, titanium and niobium/tantalum oxide with radioactive activity. Currently the betafite is included as a variety within the pyrochlore supergroup. As a note, the rich uranium term has been only found in the Moon (oxyuranobetafite).


Size: 4 x 3 x 2.5 cm.
Main crystal: 2.4 x 2.4 cm

Presents radioactive activity.


 

RM2098   Fluorapatite

Yates mine, Otter Lake, Pontiac RCM, Outaouais, Québec, Canada

Curious group of fluorapatite crystals, of intense green color, interpertered and with parallel growths. One side is crystalized, the other not... A curiosity analyzed since we doubted that it was not a diopside.


Size: 4 x 2.2 x 1.2 cm.

 

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
 

RM2097   Arsenatian Vanadinite

San Carlos mine, San Carlos, Manuel Benavides, Chihuahua, Mexico

Rich group of sharp arsenical vanadinite crystals, with curved faces prisms, barrel-shaped and many of them doubly terminated, with the characteristic color of this variety. Two generations of crystals are observed, those of greater size opaque and with a brown tone, on which a second generation of transparent toasted honey tone crystals has grown, all very very brilliant. A pleasure under the magnifying glass. This mine is also known as Apex.


Size: 4.2 x 4 x 2.8 cm.
Main crystal: 9 mm.

 

RM2103   Hilgardite, Boracite and magnesite

Boulby Mine, Loftus, North Yorkshire, England, United Kingdom

Very rich hilgardite specimen showing a reddish-colored sharp crystals. They are covering a layer of boracite crystals, as a matrix. Both boracite and hilgardite, are magnesium and calcium chloroborates respectively. This mine, which is located east of Loftus, near Easington, is worked to obtain sodium and potassium salts. When miners find veins of these borates, the rock becomes very hard, which is a problem for exploitation and a joy for collectors. This English mineral classics are not usual in the market.


Size: 4 x 3.2 x 3 cm.

Classic locality
 

RM2102   Boracite, Hilgardite and magnesite

Boulby Mine, Loftus, North Yorkshire, England, United Kingdom

Specimens of boracite from this English mine show a pale bluish tone, with complex forms of the tetrahedron, modified by the cube and the dodecahedron, and stepped growths. Between transparent to translucent. They are accompanied by colorless hexagonal tabular crystals of magnesite and aggregates of reddish-colored hilgardite crystals. Boracite shows reddish hues due to hilgardite inclusions.
Both boracite and hilgardite, are magnesium and calcium chloroborates respectively. This mine, which is located east of Loftus, near Easington, is worked to obtain sodium and potassium salts. When miners find veins of these borates, the rock becomes very hard, which is a problem for exploitation and a joy for collectors. This English mineral classics are not usual in the market.


Size: 5 x 4.6 x 4.4 cm.
Main crystal: 5 mm.

Classic locality
 

RM2138   Boracite, Hilgardite and magnesite

Boulby Mine, Loftus, North Yorkshire, England, United Kingdom

Specimens of boracite from this English mine show a pale bluish tone, with complex forms of the tetrahedron, modified by the cube and the dodecahedron, and stepped growths. Between transparent to translucent. They are accompanied by colorless hexagonal tabular crystals of magnesite and aggregates of reddish-colored hilgardite crystals. Boracite shows reddish hues due to hilgardite inclusions.
Both boracite and hilgardite, are magnesium and calcium chloroborates respectively. This mine, which is located east of Loftus, near Easington, is worked to obtain sodium and potassium salts. When miners find veins of these borates, the rock becomes very hard, which is a problem for exploitation and a joy for collectors. This English mineral classics are not usual in the market.


Size: 7.8 x 5.2 x 3.5 cm.
Main crystal: 4 mm.

Classic locality
 

RM2101   Boracite, Hilgardite and magnesite

Boulby Mine, Loftus, North Yorkshire, England, United Kingdom

Specimens of boracite from this English mine show a pale bluish tone, with complex forms of the tetrahedron, modified by the cube and the dodecahedron, and stepped growths. Between transparent to translucent. They are accompanied by colorless hexagonal tabular crystals of magnesite and aggregates of reddish-colored hilgardite crystals. Boracite shows reddish hues due to hilgardite inclusions.
Both boracite and hilgardite, are magnesium and calcium chloroborates respectively. This mine, which is located east of Loftus, near Easington, is worked to obtain sodium and potassium salts. When miners find veins of these borates, the rock becomes very hard, which is a problem for exploitation and a joy for collectors. This English mineral classics are not usual in the market.


Size: 7.5 x 6 x 2.4 cm.
Main crystal: 3 mm.

Classic locality
 

RM2100   Boracite, Hilgardite and magnesite

Boulby Mine, Loftus, North Yorkshire, England, United Kingdom

Specimens of boracite from this English mine show a pale bluish tone, with complex forms of the tetrahedron, modified by the cube and the dodecahedron, and stepped growths. Between transparent to translucent. They are accompanied by colorless hexagonal tabular crystals of magnesite and aggregates of reddish-colored hilgardite crystals. Boracite shows reddish hues due to hilgardite inclusions.
Both boracite and hilgardite, are magnesium and calcium chloroborates respectively. This mine, which is located east of Loftus, near Easington, is worked to obtain sodium and potassium salts. When miners find veins of these borates, the rock becomes very hard, which is a problem for exploitation and a joy for collectors. This English mineral classics are not usual in the market.


Size: 8.4 x 5.2 x 2 cm.
Main crystal: 2 mm.

 

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.

 

RM2118   Rhodochrosite

Moanda Mine, Moanda, Léboumbi-Leyou, Haut-Ogooué, Gabon

Druse of elongated scalenohedral rhodochrosite crystals, with flattened rhombohedral terminations. They have an intense colour, brilliance, transparent to translucent. On a matrix of manganese oxides. A classic and lost locality from which it is currently very difficult to obtain samples like this that came out in the 1970s and early 1980s and no more has been found.


Size: 5.4 x 4.7 x 3.2 cm.
Main crystal: 6 mm.
Found in ±1980.

Classic locality
 

RM2117   Rhodochrosite

Moanda Mine, Moanda, Léboumbi-Leyou, Haut-Ogooué, Gabon

Druse of elongated scalenohedral rhodochrosite crystals, with flattened rhombohedral terminations. They have an intense colour, brilliance, transparent to translucent. On a matrix of manganese oxides. A classic and lost locality from which it is currently very difficult to obtain samples like this that came out in the 1970s and early 1980s and no more has been found. With old label.


Size: 6.5 x 5.2 x 3.8 cm.
Main crystal: 6 mm.
Found in ±1980.



 

RM2116   Rhodochrosite

Moanda Mine, Moanda, Léboumbi-Leyou, Haut-Ogooué, Gabon

Druse of very elongated scalenohedral rhodochrosite crystals, with flattened rhombohedral terminations. They have an intense colour, brilliance, transparent to translucent. On a matrix of manganese oxides. A classic and lost locality from which it is currently very difficult to obtain good size samples like this that came out in the 1970s and early 1980s and no more has been found. With old label.


Size: 11.4 x 10.2 x 5.3 cm.
Main crystal: 3 mm.
Found in ±1980.

Classic locality


 

RM2120   Bournonite with pyrite, galena

Huanzala Mine, Huallanca, Dos de Mayo, Huánuco, Peru

Very aesthetic specimen formed by numerous bournonite crystals, excellent luster, sharps and cyclically twinned. They are accompanied by cube octahedral galena crystals with rounded faces and edges and brilliant pyrite. Nice miniature.


Size: 4.5 x 3.6 x 2.4 cm.
Main crystal: 8 mm.
Found in 2019.

 
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