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RM1397   Autunite and torbernite

Cunha Baixa Mine, Cunha Baixa, Mangualde, Viseu, Portugal

Groups of autunite tabular crystals with an intense and characteristic yellow color, brilliance, transparent, some of them growing epitaxial on torbernite (metatorbernite). They are disposed covering cavities of a matrix of goethite. An old specimen from a classic Portuguese locality.


Size: 7.3 x 6.8 x 4.5 cm.
Found in 1980's.

Fluorescent under LWUV and SWUV
Presents radioactive activity.


 

RM1812   Saléeite - Metasaléeite

Cunha Baixa Mine, Cunha Baixa, Mangualde, Viseu, Portugal

Groups of tabular saléeite to metasaléeite crystal aggregates, with a characteristic greenish-yellow color, transparent to translucent, due to the loss of water. The shade is much more greenish than the autunite.

 


Size: 6.0 x 5.4 x 4.6 cm.
Main crystal: 3 x 2 mm.
Found in ca. 1990.

Col. J.M. Manchión (Barcelona). Label Joan Viñals.


 

RM2003   Fluorite and quartz

Stanhope, Co. Durham, United Kingdom

An aesthetic fluorite specimen showing a violet tone turned to pink, crystals very clear, transparent and arranged on tiny quartz crystals. It shows double interpenetration of two individuals. Very fluorescent under LW-UV.


Size: 6.4 x 5.2 x 2.6 cm.
Main crystal: 0.8 cm.
Found in 1989.

Fluorescent under long wave UV


Price: 55 €Buy
 

RM1721   Twinned fluorite and quartz

Heights Quarry, Bere Alston, Westgate, Stanhope, Co. Durham, United Kingdom

An aesthetic fluorite specimen showing a violet tone turned to pink, crystals very clear, transparent and arranged on tiny quartz crystals. But what makes this piece special is the triple interpenetrating spinel twin that shows the largest group of crystals. Others crystals show double interpenetration of two individuals. Very fluorescent under LW-UV. A more than remarkable piece.


Size: 8.2 x 6.3 x 4.5 cm.
Main crystal: 18 x 12 mm.

Col. J.M. Manchion (Barcelona).
Fluorescent under long wave UV


Price: 150 €Buy
 

RM1366   Chalcopyrite with siderite

Carn Brea and Tincroft United Mine, Carn Brea, Camborne-Redruth-St Day, Cornwall, United Kingdom

Brilliant group of chalcopyrite crystals, twinned and with complex forms, but with well defined faces and edges. The golden color, with iridescence, indicates that it is a "old" specimen. The piece comes from an interesting and classic English locality where few chalcopyrite specimens are known with this quality. These specimens were obtained at the beginning of XX century, it is a very "old" mineralogical sample from Clemens A. Winkler, german chemist who discovered the Germanium.


Size: 6.0 x 3.8 x 3.6 cm.
Main crystal: 8 x 8 mm.
Found in ±1900.

Excol. Clemens A. Winkler (1838-1904).


 

RM1425   Cerussite

Trevellance Mine, Bolingey, Perranzabuloe, St Agnes, Cornwall, United Kingdom

I purchased this specimen more than 10 years ago to the dissapeared dealer Baikal Geo (Madrid). It consists in a rich group of fibrous to prismatic aggregates of brilliant, transparent to white cerussite on a goethite matrix. This specimen is labeled from Trevellance mine, a very old Cornish mine worked for some time during the 1840s. Very interesting specimen from a rare English locality.


Size: 5.2 x 4.7 x 2.8 cm.
Main crystal: 8 x 2 mm.

 

RM1880   Fluorite

Greenlaws Mine, Daddry Shield, Weardale, Co. Durham, England, United Kingdom

The Greenlaws mine is located in Weardale, in the northern Pennines of England, south of the small town of Daddry Shield. Around we find famous mines such as Rogerly, Boltsburn or Heights... This Greenlaws mine was worked for the galena between 1840 and 1901, being one of the most important lead mines in the area. In 2009 a group of collectors started the "Greenlaws mining project". After almost 5 years digging out the vertical shaft over 80 meters (270 ft) appeared the first specimens of fluorite, ending 2013.
This specimens we propose has been extracted from vugs found in a new connecting tunnel at 270 ft, between main shaft to a second contiguous adit. Good brilliance, transparence, with geometric color zoning that varies between purple to blue according to the incident light. With defined faces and edges and these characteristic whitish internal structures. Extremely fluorescent.


Size: 7.5 x 5 x 4.5 cm.
Main crystal: 14 x 12 mm.
Found in 07/2018.

Fluorescent under long wave UV


 

RM1881   Fluorite

Greenlaws Mine, Daddry Shield, Weardale, Co. Durham, England, United Kingdom

The Greenlaws mine is located in Weardale, in the northern Pennines of England, south of the small town of Daddry Shield. Around we find famous mines such as Rogerly, Boltsburn or Heights... This Greenlaws mine was worked for the galena between 1840 and 1901, being one of the most important lead mines in the area. In 2009 a group of collectors started the "Greenlaws mining project". After almost 5 years digging out the vertical shaft over 80 meters (270 ft) appeared the first specimens of fluorite, ending 2013.
This specimens we propose has been extracted from vugs found in a new connecting tunnel at 270 ft, between main shaft to a second contiguous adit. Good brilliance, transparence, with geometric color zoning that varies between purple to blue according to the incident light. With defined faces and edges and these characteristic whitish internal structures. Extremely fluorescent.


Size: 6.7 x 6.2 x 3.8 cm.
Main crystal: 18 x 14 mm.
Found in 07/2018.

Fluorescent under long wave UV


 

RM1882   Fluorite

Greenlaws Mine, Daddry Shield, Weardale, Co. Durham, England, United Kingdom

The Greenlaws mine is located in Weardale, in the northern Pennines of England, south of the small town of Daddry Shield. Around we find famous mines such as Rogerly, Boltsburn or Heights... This Greenlaws mine was worked for the galena between 1840 and 1901, being one of the most important lead mines in the area. In 2009 a group of collectors started the "Greenlaws mining project". After almost 5 years digging out the vertical shaft over 80 meters (270 ft) appeared the first specimens of fluorite, ending 2013.
This specimens we propose has been extracted from vugs found in a new connecting tunnel at 270 ft, between main shaft to a second contiguous adit. Good brilliance, transparence, with geometric color zoning that varies between purple to blue according to the incident light. With defined faces and edges and these characteristic whitish internal structures. Extremely fluorescent.


Size: 7.5 x 6.5 x 6.4 cm.
Main crystal: 18 x 16 mm.
Found in 07/2018.

Fluorescent under long wave UV


 

RM1883   Fluorite

Greenlaws Mine, Daddry Shield, Weardale, Co. Durham, England, United Kingdom

This specimen was worked from the area known as Great Limestone Flats. Crystals of good size, brightness, with intense geometric color zoning, that varies from purple to blue according to incident light. With defined faces and edges and these characteristic whitish internal structures. Accompanied by samll siderite crystals and galena. Extremely fluorescent.
The Greenlaws mine is located in Weardale, in the northern Pennines of England, south of the small town of Daddry Shield. Around we find famous mines such as Rogerly, Boltsburn or Heights... This Greenlaws mine was worked for the galena between 1840 and 1901, being one of the most important lead mines in the area. In 2009 a group of collectors started the "Greenlaws mining project". After almost 5 years digging out the vertical shaft over 80 meters (270 ft) appeared the first specimens of fluorite, ending 2013.


Size: 8.8 x 6.5 x 4.2 cm.
Main crystal: 25 x 22 mm.
Found in 2017.

Fluorescent under long wave UV


 

RM1884   Fluorite

Greenlaws Mine, Daddry Shield, Weardale, Co. Durham, England, United Kingdom

The Greenlaws mine is located in Weardale, in the northern Pennines of England, south of the small town of Daddry Shield. Around we find famous mines such as Rogerly, Boltsburn or Heights... This Greenlaws mine was worked for the galena between 1840 and 1901, being one of the most important lead mines in the area. In 2009 a group of collectors started the "Greenlaws mining project". After almost 5 years digging out the vertical shaft over 80 meters (270 ft) appeared the first specimens of fluorite, ending 2013.
This specimens we propose has been extracted from vugs found in a new connecting tunnel at 270 ft, between main shaft to a second contiguous adit. Good brilliance, transparence, with geometric color zoning that varies between purple to blue according to the incident light. With defined faces and edges and these characteristic whitish internal structures. Extremely fluorescent.


Size: 11 x 10.5 x 5.5 cm.
Main crystal: 14 x 12 mm.
Found in 07/2018.

Fluorescent under long wave UV


Price: 190 €Buy
 

RM2099   Hematite

Beckermet Mine, Haile, Copeland, Cumbria, England, United Kingdom

Rich group of tabular hematite crystals, very brilliant and forming very aesthetic rosettes. Pepper by small quartz crystals. They are disposed on a matrix of solid hematite. This hematite mine is located southeast of Egremont and was operated from 1903 until its closure in 1973. This aesthetic piece comes from an unidentified German collection.


Size: 4.6 x 4.5 x 2.4 cm.



 

RM1906   Twinned calcite

Hobbs quarry, Forest of Dean, Gloucestershire, England, United Kingdom

This English specimen shows us a group of calcite crystals, one of them of larger size, interpenetrated, twinned, with a color between honey to white. With defined faces and edges, translucent. In the back it shows a exfoliated part. A sample from a mine not well represented in collections. From the Adrian collection, a dealer and collector from the United Kingdom. Label will be send with specimen.


Size: 9 x 6.4 x 6 cm.
Found in 09/1982

Fluorescent under long wave UV


Price: 60 €Buy
 

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.

 

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
Price: 90 €Buy
 

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
 

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
 

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
 

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


 

RM1889   Hydroxyapophyllite-(K)

Hightown Road Quarry, Co. Antrim, Northern Ireland, United Kingdom

Very curious specimen of hydroxylapophyllite-(K) formed by numerous crystals inside a geode resembling a nodule. They are accompanied by small needles of calcite very fluorescent (bluish).


Size: 6.5 x 3.8 x 3.5 cm,
Main crystal: 6 x 6 mm.
Found in 2017.

Calcite is fluorescent under LW-UV.
Price: 45 €Buy
 

RM1668   Hematite & Baryte

Auchencairn, Dumfries & Galloway, Scotland, United Kingdom

Aesthetic and brilliant botryoidal hematite from a Scotish locality not well represented in collections. On a reddish baryte matrix.


Size: 8.0 x 7.2 x 4.5 cm.

Ex-col Daunis (Barcelona)
Price: 60 €Buy
 

RM1901   Brewsterite-Sr

Whitesmith Mine, Strontian, Highland, Scotland, United Kingdom

Brewsterite belongs to the group of zeolites, but it is an unusual species. This specimen comes from the type locality for the species. The sample is partially covered with prismatic crystals, transparent to translucent (a wonder under magnifying glass), very defined and forming aesthetic aggregates.


Found in ±2009

 

RM1892   Pyromorphite on quartz

Burgam Mine, Stiperstones, Hope-Shelve, Shropshire, United Kingdom

Rich group of pyromorphite crystals, of intense color with hexagonal forms in barrel. It comes from an English mine not well represented in collections. ittle is known about the early history but it was connected to the Boat Level by a shaft for drainage so was probably first worked in the early 19th Century. There is a reference to it working in 1866. In the 1960s, 7 levels by the road were being worked on a small scale for barite.


Size: 6,5 x 4,6 x 3,8 cm
Main crystal: 3 mm

Excol. Paul Nicholson #2237


 

RM806   Feldspar pseudomorph after leucite

Krušné Hory Mts (Erzgebirge), Ostrov, Karlovy Vary, Bohemia, Czech Republic

Very curious group of interpenetrated leucite crystals pseudomorphosed by feldspar. A classic from Czech Republic appreciated by pseudomorph collectors. Good size.


Size: 5,4 x 5,3 x 4,7 cm.

 

RM131   Chalcostibite with Tetrahedrite, Quartz and Dolomite

Boldut Mine, Cavnic, Maramures, Romania

Group of small, shiny, gray metallic blades of flattened Chalcostibite crystals, some of them very aerial disposed. Accompanied by brilliant Tetrahedrite and Quartz. Chalcostibite was uncommon at Cavnic mine till 90's finding.


Size: 8.5 x 6.7 x 4.1 cm
Main crystal: 3 x 1 mm

 
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