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RM2808   Fluorite

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

Group of cubic fluorite crystals with transparence and a very aesthetic yellowish-green tone. This specimen is tagged as belonging from Wales, but we have not found information on similar specimens. The piece, from the Joan Astor collection, dates from 1975 and was acquired from Sr. Montal. It is most likely an ancient specimen from the Weardale mines.


Size: 7.3 x 4.7 x 5 cm.
Main crystal: 1.7 cm.
Found in ca. 1975.

Col. Joan Astor (Barcelona).
Fluorescent under long wave UV


Price: 90 €Reserved

 

RM2691   Rashleighite, var. of turquoise

Gunheath China Clay Pit, Stenalees, Treverbyn, Cornwall, England, United Kingdom

An interesting specimen of turquoise (variety rashleighite) from the Cornwall mines. Formerly, rashleighite was an approved species, now it is defined as a turquoise with a certain iron content, intermediate between chalcosiderite and turquoise. This sample shows a sky blue crust aggregates, with cavities with crystals and a quartz matrix. A Cornish classic from the collection of Joan Astor (Barcelona) and, previously, from Martín Oliete (Madrid), a well-known systematic collector.


Size: 4.7 x 4.1 x 3.2 cm.
Found in ± 1984.

Col. Joan Astor (Barcelona). Col. Martín Oliete (Madrid).
Classic locality


 

RM2218   Fluorite

Heights Mine, Westgate, Stanhope, County Durham, England, United Kingdom

Group of fluorite crystals from this classic English mine, presents the shapes of the cube, interpenetrated and some twinned. Good transparence and very characteristic green color. This sample is photographed in some books that Joan Astor published in issuu [online pág. 34]. It was acquired in 1980 from Bailey Minerals (Ángel Jesús Talabán García, Segovia 1942-Madrid 2007). A very aesthetic piece.


Size: 6.8 x 3.5 x 3.5 cm.
Main crystal: 9 mm. edge/arista
Found in 1970-80's.

Col. Joan Astor.
Fluorescent under long wave UV


 

RM2219   Mimetite, var. Campylite

Dry Gill Mine, Caldbeck, Allerdale, Cumbria, England, United Kingdom

Various aggregates of mimetite crystals, rounded, globular, orange color. From this classic English locality known for this mimetite variety. With handwritten label of Kucera (Barcelona). The finest mimetite specimens were collected in the 19th century but, although increasingly hard to find, some fine material has been obtained since, particularly in the 1970's. However, the mine is notoriously unstable and there have been a number of accidents involving collectors. No one has been critically injured but the incidents have highlighted the dangers of the old workings in the Caldbeck Fells (mindat).


Size: 6.5 x 3.2 x 3 cm.
Main crystal: 3 mm.
Found in 1970's.

Col. Joan Astor.
Classic locality


Price: 40 €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


 

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.



Price: 55 €Buy
 

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.

 

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
 

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 €Reserved

 

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


 

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


 

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


 

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


 
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