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RM1604   Čechite with fluorite

Maria Magdalena Mine, Rasa de l'Alzina, Ulldemolins, Tarragona, Catalunya, Spain

Probably čechite specimens from the "Rasa de l'Alzina" open pit works could be considered between the best crystals for the species worldwide. They are brilliant, black color and show a tabular shape defined by different order orthorhombic prisms and developed pinacoidal faces. They are disposed on a fluorite matrix. This finding is close to the Maria Magdalena mine, near of the beautiful town of Ulldemolins (Tarragona, Catalonia).
SEM-EDS and EPMA analysis show that, in some cases, on the čechite crystal surface we found copper content, but inside the crystal is near to pure PbFe<sup>2+</sup>(VO<sub>4</sub>)(OH), with minor Zn(II). In most specimens from other localities the presence of manganese is important, but these specimens are Mn free.


Size: 5.5 x 4.2 x 2.4 cm.
Found in 2016-2017.

 

RM1580   Fluorite with quartz

Berbes, Ribadesella, Asturias, Spain

A very curious specimen of fluorite from Berbes, formed by a matrix of hyaline quartz crystals, on which have been growth several colorful cubes. The cubes show edges and defined faces, violet tone, dull gloss and translucent. The sample presents a yellow tonality, a piece from past times from a former Catalan collection.


Size: 6.0 x 6.0 x 5.0 cm.
Main crystal: 20 x 19 mm.
Found in ±1975.

 

RM1605   Čechite with fluorite

Maria Magdalena Mine, Rasa de l'Alzina, Ulldemolins, Tarragona, Catalunya, Spain

Probably čechite specimens from the "Rasa de l'Alzina" open pit works could be considered between the best crystals for the species worldwide. They are brilliant, black color and show a tabular shape defined by different order orthorhombic prisms and developed pinacoidal faces. They are disposed on a fluorite matrix. This finding is close to the Maria Magdalena mine, near of the beautiful town of Ulldemolins (Tarragona, Catalonia).
SEM-EDS and EPMA analysis show that, in some cases, on the čechite crystal surface we found copper content, but inside the crystal is near to pure  PbFe2+(VO4)(OH), with minor Zn(II). In most specimens from other localities the presence of manganese is important, but these specimens are Mn free.


Size: 7.0 x 4.5 x 2.7 cm.
Found in 2016-2017.

Analyzed specimen with report


 

RM1577   Twinned cerussite

Tsumeb mine (Tsumcorp), Tsumeb, Otjikoto, Namibia

Excellent growth of cyclic twins of cerussite, with very sharp crystals and well defined faces and edges, transparent to translucent, really brilliant... A very good classic with a notable quality and coming from past 60's of the XXth. Not easy to find nowadays.


Size: 6.4 x 5.5 x 4.6 cm.
Found in ±1960

 

RM1589   Zircon

Harchu, Astor valley, Astor, Gilgit-Baltistan, Pakistan

Brilliant, wine red, translucent, internal red lights... Group of zircon crystals with defined faces and edges. These gems are disposed in a matrix with squist, mica and quartz.


Size: 6.5 x 4.8 x 4.0 cm.
Main crystal: 10 x 6 mm.

 

RM1588   Zircon

Harchu, Astor valley, Astor, Gilgit-Baltistan, Pakistan

Brilliant, wine red, glassy zircon crystal, with internal red lights. It shows very clearly the faces of the tetragonal prism and both dipyramids, doubly terminated. A gem very aesthetically disposed on a quartz and mica (gneiss) matrix.


Size: 5.4 x 5.0 x 2.7 cm.
Main crystal: 13 x 9 mm.

Price: 75 €Buy
 

RM1587   Fluorite and baryte

Bergheim, Ribeauvillé, Haut-Rhin, France

Very rich specimen formed by good size sharp crystals of fluorite, with cubic habit, and very well defined faces and edges, good transparence, intense color between purple and violet with intense zoning. This color zoning becomes very evident when the crystals are exposed to the ultraviolet light (LW), since the fluorescence also presents this zoned cubic geometry. They are accompanied by several tabular crystals of baryte on a matrix layered by small quartz crystals.
These specimens come from the town of Bergheim, known for being on the Alsace wines route. Although fluorite crystals were already known in some of the mining works of the area, these specimens come from a work done in a "domaine" (vineyard) in 2017.


Size: 5.2 x 4.5 x 2.5 cm.
Main crystal: 9 x 9 mm.
Found in 2017.

Fluorescent under long wave UV


 

RM1585   Fluorite and baryte

Bergheim, Ribeauvillé, Haut-Rhin, France

Very rich specimen formed by numerous sharp crystals of fluorite, with cubic habit, and very well defined faces and edges, good transparence, intense color between purple and violet with intense zoning. This color zoning becomes very evident when the crystals are exposed to the ultraviolet light (LW), since the fluorescence also presents this zoned cubic geometry. They are accompanied by several tabular crystals of baryte on a matrix layered by small quartz crystals.
These specimens come from the town of Bergheim, known for being on the Alsace wines route. Although fluorite crystals were already known in some of the mining works of the area, these specimens come from a work done in a "domaine" (vineyard) in 2017.


Size: 6.0 x 4.8 x 4.5 cm.
Main crystal: 6 x 6 mm.
Found in 2017.

Fluorescent under long wave UV


 

RM1583   Hematite and quartz

Brézouard Massif, Ste Marie-aux-Mines, Haut-Rhin, France

This brilliant specimen is an old time hematite from "Le Brézouard", a early 80's finding in the area of Sainte-Marie-aux-Mines. These specimens show a very characteristic hexagonal shape formed by several tabular to laminar brilliant hematite crystals forming aggregates interpenetrated and on a quartz matrix. In this specimen highlights the visibility of the quartz crystals of the matrix, unusual, and the aggregates of small doubly terminated crystals of quartz on the hematite. A very aesthetic and classic specimen for the mining area of Sainte-Marie area.


Size: 7.0 x 5.1 x 1.5 cm.
Main crystal: 11 x 5 mm.
Found in 1980's.

 

RM1584   Hematite and quartz

Brézouard Massif, Ste Marie-aux-Mines, Haut-Rhin, France

This good size brilliant specimen is an old time hematite from "Le Brézouard", a early 80's finding in the area of Sainte-Marie-aux-Mines. These specimens show a very characteristic hexagonal shape formed by several tabular to laminar brilliant hematite crystals forming aggregates interpenetrated and on a quartz matrix. A really classic specimen for French and "Sainte-Marie" mineralogy.


Size: 7.8 x 6.4 x 2.5 cm.
Main crystal: 8 x 4 mm.
Found in 1980's.

 

RM1598   Gold, var. electrum and Erythrite

Taghouni mine, Taghouni, Bou Azer, Tazenakht, Ouarzazate, Morocco

A novelty in Sainte-Marie-aux-Mines (2017). Matrix formed by sulphides, arsenites and arsenates of Co like erythrite, with some crystals, accompanied by several wire to laminar gold aggregates. SEM analysis shows that it is a rich silver gold, variety electrum, unusual. Silver content is similar in all specimens we have analyzed and varies between 20-24% weight.
Under loupe, we can enjoy that some of these gold aggregates are formed by small crystals of octahedral to cubic forms. We can theorize a secondary genesis for this gold-electrum. We have analyzed the matrix of these specimens observing that the bright metallic matrix corresponds to a mixture of cobalt arsenides, probably skutterudite, and other sulphides. We will send all analyzes to the buyer. The gold and electrum in Bou Azer was already described, but the quality of these specimens we offer surpasses what was known.


Size: 6.0 x 4.7 x 2.4 cm.
Found in 2017

Analyzed specimen with report
 

RM1597   Gold, var. electrum and Erythrite

Taghouni mine, Taghouni, Bou Azer, Tazenakht, Ouarzazate, Morocco

A novelty in Sainte-Marie-aux-Mines (2017). Matrix formed by sulphides, arsenites and arsenates of Co like erythrite, with some crystals, accompanied by several wire to laminar gold aggregates. SEM analysis shows that it is a rich silver gold, variety electrum, unusual. Silver content is similar in all specimens we have analyzed and varies between 20-24% weight.
Under loupe, we can enjoy that some of these gold aggregates are formed by small crystals of octahedral to cubic forms. We can theorize a secondary genesis for this gold-electrum. We have analyzed the matrix of these specimens observing that the bright metallic matrix corresponds to a mixture of cobalt arsenides, probably skutterudite, and other sulphides. We will send all analyzes to the buyer. The gold and electrum in Bou Azer was already described, but the quality of these specimens we offer surpasses what was known. A very nice miniature with several wire and laminar electrum.


Size: 4.0 x 3.3 x 2.6 cm.
Found in 2017

Analyzed specimen with report
 

RM1596   Gold, var. electrum

Taghouni mine, Taghouni, Bou Azer, Tazenakht, Ouarzazate, Morocco

A novelty in Sainte-Marie-aux-Mines (2017). These specimens show a matrix formed by associated sulphides and arsenates of cobalt and iron. We can observe on both the presence of arborescent, filiform and laminar gold aggregates. SEM analysis has shown that this is a variety of gold rich in silver (20-24%weight): electrum. Under the loupe we can enjoy that some of these aggregates are formed by small crystals of octahedral to cubic shape of the precious metal. We can think a secondary genesis for this gold electrum. We have analyzed these specimens observing that the brilliant metallic matrix corresponds to skutterudite and other sulphides-arsenides. We will send all analysis to the buyer. The gold and electrum in Bou Azer was already described, but the quality of these specimens we offer surpasses what was known. A very rich gold specimen, with good size and aesthetic.


Size: 6.5 x 4.5 x 3.6 cm.
Main crystal: 18 mm.
Found in 2017

Analyzed specimen with report


 

RM1595   Arsenatian Vanadinite

Touissit, Touissit-Bou Beker, Jerada, Oriental Region, Morocco

Rich group of so called arsenatian vanadinite showing defined edges and curved faces, barrel-shaped and many of them doubly terminated, with the characteristic color of this variety. These samples appeared on the market in the late 1970s as pyromorphite, until they were correctly determined by XRD and SEM-EDS analysis. This specimen has been analyzed, just for info, showing As 3.3%weight and 9% in V. Old specimen, nowadays rare to find.


Size: 9.2 x 6.5 x 5.2 cm.
Main crystal: 9 x 6 mm.
Found in 1980's



 

RM1594   Wulfenite with arsenatian vanadinite and calcite

Erupción-Ahumada mine, Los Lamentos Mts, Mun. de Ahumada, Chihuahua, Mexico

Very rich specimen formed by numerous prismatic crystals of wulfenite, with orange color zoning. They are brilliant and disposed very aerially on the matrix. It is accompanied by calcite, which in the back part of the specimen partially covers the crystals of wulfenite, with small aggregates of yellowish arsenatian vanadinite crystals, curiously close to pyromorphite. We will send the analysis to the buyer. A specimen more than aesthetic historical, fine quality and from a classic Mexican locality.


Size: 7.0 x 4.5 x 2.5 cm.
Main crystal: 12 x 6 mm.

Ex.Col. Marcus Grossman (D)


 

RM1592   Hematite and quartz

Tête du Violu, Col de Ste Marie, Ste Marie-aux-Mines, Haut-Rhin, France

On a druse of quartz crystals we can enjoy numerous aggregates of hematite crystals with a hexagonal to rounded shape and conical growth, very curious, with brilliance and brown to reddish color. These specimens come from a fortuitous find in an area very close to the well-knoewn town of Sainte-Marie-aux-Mines. An aesthetic rarity.


Size: 7.1 x 6.5 x 3.2 cm.
Main crystal: 3 mm.
Found in 2000.



Price: 40 €Reserved
 

RM1593   Blue halite

Stassfurt Potash deposit, Stassfurt, Saxony-Anhal, Germany

A halite crystal with an intense blue color, phantom, from an old classic German locality: Stassfurt. The startling blue tone seems unreal. Halite specimens are rarely found with these bluish colors. With an interesting spherical inclusions (see pictures). The color is due to atomic lattice defects, not due to inclusions or impurities. An old specimen.


Size: 5.0 x 4.0 x 3.0 cm.
Found in ca 1970's.

Ex.Col. Daunis (Barcelona).
 

RM1591   Gold, var. electrum and Erythrite

Taghouni mine, Taghouni, Bou Azer, Tazenakht, Ouarzazate, Morocco

A novelty in Sainte-Marie-aux-Mines (2017). These specimens show a matrix formed by arsenates such as erythrite and associated sulphides and arsenates of cobalt and iron. We can observe on both the presence of arborescent, filiform and laminar gold aggregates. SEM analysis has shown that this is a variety of gold rich in silver (20-24%w): electrum.
Under the loupe we can enjoy that some of these aggregates are formed by small crystals of octahedral to cubic shape of the precious metal. We can think a secondary genesis for this gold electrum. We have analyzed these specimens observing that the brilliant metallic matrix corresponds to skutterudite and other sulphides. We will send all analysis to the buyer. The gold electrum in Bou Azer was already described, but the quality of these specimens we offer surpasses what was known. A very rich gold specimen, with good size and aesthetic.


Size: 11.5 x 7.8 x 6.5 cm.
Main crystal: 12 mm
Found in 2017

 

RM1590   Gold, var. electrum and Erythrite

Taghouni mine, Taghouni, Bou Azer, Tazenakht, Ouarzazate, Morocco

A novelty in Sainte-Marie-aux-Mines (2017). These specimens show a matrix formed by arsenates such as erythrite and associated sulphides and arsenates of cobalt and iron. We can observe on both the presence of arborescent, filiform and laminar gold aggregates. SEM analysis has shown that this is a variety of gold rich in silver (23-24%w): electrum.
Under loupe, we can enjoy that some of these gold aggregates are formed by small crystals of octahedral to cubic forms. We can theorize a secondary genesis for this gold-electrum. We have analyzed the matrix of these specimens observing that the bright metallic matrix corresponds to a mixture of cobalt arsenides, probably skutterudite, and other sulphides. We will send all analyzes to the buyer. The gold and electrum in Bou Azer was already described, but the quality of these specimens we offer surpasses what was known. A very rich gold-electrum specimen, with good size and aesthetic.


Size: 7.5 x 6.0 x 4.0 cm.
Main crystal: 10 mm.
Found in 2017

 

RM1601   Galena, Pyrite and sphalerite

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

A really curious specimen that shows a matrix with well developed crystals of pyrite, partially covered by galena, very bright and with extremely rounded forms, remarkable shape! It is also accompanied by complex crystals of sphalerite. A very aesthetic, unusual and interesting sample.


Size: 6.2 x 6.0 x 4.4 cm.

Price: 75 €Buy
 

RM1599   Chalcopyrite

Friedrich-Wilhelm Mine, Herdorf, Siegerland, Rhineland-Palatinate, Germany

Rich group of chalcopyrite crystals, very brilliant, of intense luster and gold to bronze tones. They stand out for the richness of crystal facets, that show us very defined sphenoidal forms, some dipyramids and basal pinacoids, complex but identifiable. To enjoy crystallography... A specimen of a German locality not well represented in collections.


Size: 6.0 x 5.0 x 4.5 cm.
Main crystal: 5 x 4 mm.

 

RM1602   Quartz, Japan Law Twin with inclusions

Mundo Nuevo mine, Huamachuco, Sánchez Carrión, La Libertad, Peru

Very visible quartz Japan twin law (84°33'), formed by two well developed crystals. Transparence, perfection and with very interesting reddish acicular inclusions of indeterminate species (hübnerite?). From a classic locality very aesthetic piece.


Size: 7.8 x 4.5 x 4.0 cm.
Main crystal: 35 x 10 x 3 mm (50 mm. twin-macla).

 

RM1600   Cuprite and Malachite

Mashamba West Mine, Kolwezi, Katanga, Congo, Democratic Republic of

These cuprite crystals from Kolwezi mines are a classic of worldwide mineralogy. In this specimen the crystal shows defined faces and edges, with intense red color under the light. It is disposed in a cavity with needle malachite crystal aggregates. Crystal has no damage, the back side shows natural rounded forms. A very aesthetic and difficult to see specimen.


Size: 7.2 x 5.2 x 4.7 cm.
Main crystal: 12 x 7 mm.

Classic locality
 

RM1573   Torbernite and quartz

Le Boucheron, Davignac, Corrèze, Nouvelle-Aquitaine, France

A very rich group of torbernite crystals, with an intense green color, brilliance and excellent transparence. We can observe that close to this rich group, the matrix formed by smoky quartz crystals are sprinkled with tabular and tetragonal prismatic truncated by the pinacoids crystals. An amazing specimen for close observation and a piece from a French locality not represented in collections. This mine was worhked for uranium between 1987 and 1989. Also with the quality label of the collection Alain Martaud and from B. Barrière.


Size: 6.8 x 6.0 x 3.7 cm.

Ex-col. Alain Martaud - B. Barrière
Presents radioactive activity.


 

RM1572   Clinoatacamite with malachite, chrysocolla, calcite and quartz

Lily Mine, Pisco Umay, Ica, Peru

Very rich group of sharp clinoatacamite crystals, many of them isolated, very well defined faces and edges, interpenetrated, with pseudohexagonal and octahedral forms. Very brilliant and with some transparence. They are disposed on a matrix formed by brilliant quartz covering aggregates of deep green malachite crystals and chrysocolla. Peppered with scalenohedral crystals of calcite. A very aesthetic and interesting specimen of good size. I like Peruvian clinotacamite...


Size: 7.5 x 6.5 x 5.0 cm.
Main crystal: 0.7 x 0.5 cm.
Found in 2016.

 
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