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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 €Reserved
 

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

 

RM1864   Rhodochrosite with tetrahedrite, chalcopyrite and quartz

Boldut Mine, Cavnic, Maramures, Romania

Nice specimen formed by rosette aggregates of rhodochrosite, with a delicate pink tone, accompanied by tetrahedrite and chalcopyrite crystals. On a matrix with quartz.


Size: 7.5 x 6.8 x 5.8 cm.

 

RM1547   Hisingerite

Brunnsjögruvan, Grythyttan, Hällefors, Västmanland, Sweden

Hisingerite is a rare hydrated iron hydroxylsilicate and its type locality is Riddarhyttan (Sweden), near from this specimen locality we offer. This sample shows radial laminar aggregates with an intense dark brown to almost black color, with metallic luster. Specimens of hisingerite are very rare and this piece is from the collection of Renaud Vochten (1933-2012), a well-known Belgian collector of mineralogical rarities. This specimen was adquired by Mr. Vochten in 1975 to V. H. Sørensen.


Size: 7.2 x 6.5 x 3.8 cm.
Found in ca. 1975.



 

RM1625   Cobaltite

Håkansboda, Lindesberg, Västmanland, Sweden

This is a brilliant and esthetic cobaltite specimen that shows a sharp and brilliant crystal, with dominant forms of the cube and pyritohedron, included in the massive pyrrhotite matrix. Håkansboda is an old mine, opened in the 17th century and worked until 1873, with only minor mining during World War I. An European classic mine and specimen.


Size: 6.4 x 4.9 x 4.5 cm.
Main crystal: 8 x 7 mm.
Found in 1980's.

Excol. Lluís Daunis & Maria Ruscalleda (Barcelona).
Classic locality
 

RM1443   Actinolite (byssolite) with quartz and albite

Druntobel, Kreuzli pass, Sedrun, Tujetsch, Grischun, Switzerland

From a locality not well represented in collections, we can enjoy this specimen formed by several fibrous aggregates of actinolite (byssolite), brilliant and with a greenish color. Disposed on a matrix with quartz and albite.


Size: 7.4 x 4.0 x 2.5 cm.

Price: 45 €Buy
 

RM1645   Piemontite & Braunite

Tinizong, Oberhalbstein, Albula, Grisons, Switzerland

Piemontite specimens from this Swiss area are uncommon. We can see groups of prismatic radiated deep red piemontite crystals embeded and contrasting with the white quartz matrix. Accompanied by black layers of braunite. Piemontite has been analyzed (ARM1581) and we will send results to the buyer.


Size: 7.0 x 5.5 x 3.6 cm.

Analyzed specimen with report
 

RM1649   Piemontite & Braunite

Tinizong, Oberhalbstein, Albula, Grisons, Switzerland

Piemontite specimens from this Swiss area are uncommon. We can see groups of prismatic radiated deep red piemontite crystals embeded and contrasting with the white quartz matrix. Accompanied by black layers of braunite. Piemontite has been analyzed (ARM1581) and we will send results to the buyer.


Size: 4.0 x 2.4 x 1.0 cm.

 

RM1713   Adularia (K Feldspar variety)

Val Giuv, Tavetsch, Vorderrheintal, Grisons, Switzerland

A glassy, translucent to transparent, very sharp, colorless adularia interpenetrated crystals from this classic Swiss locality. Green chlorite has nicely dusted and accented this excellent piece, which is complete all-around and is essentially pristine, except for contacting at the base. An old specimen.
Val Giuv is very rich in Alpine-type fissures, in particular, the Giuv syenite. Pockets are unevenly distributed and are concentrated along the southern boundary of the Giuv syenite rock body. Alpine-type fissures also occur in the aplite dikes but differ slightly in their paragenesis (beryllium minerals like milarite only occur in and around aplites).


Size: 6.5 x 6 x 5.5 cm.
Found in 1970's

Ex. L. Daunis (Barcelona)


 

RM1469   Tremolite in dolomite

Campolungo, Val Piumogna, Leventina, Ticino, Switzerland

Rich group of prismatic elongated tremolite crystals, with defined forms, some doubly terminated, with terminal faces. They are disposed in a dolomite saccharoid matrix. A really fine specimen, good size and from the type locality. From the Ruilbeurs collection. Unusual in the market.


Size: 12.0 x 8.4 x 4.5 cm.
Main crystal: 40 x 7 mm.
Found in 1974.

Localidad tipo / Type locality
Fluorescent under long wave UV


 

RM2034   Smoky quartz with adularia

Galenstock, Tiefenbach, Urseren, Uri, Switzerland

Really good specimen from the high Swiss mountains of the Galenstock area, 3586 m., known for its smoky quartz. This good sized piece shows several of them, with excellent transparence, very uniform smoky tone, with defined faces and edges and partially covered with 'chlorite'. They are accompanied in the matrix with numerous crystals of adularia (variety of feldspar K), well defined. A piece for the display.


Size: 11 x 7 x 6 cm.
Main crystal: 3.3 x 1.5 cm.
Found in 2017.

Price: 180 €Buy
 

RM1495   Smoky quartz with hematite and feldspar

Kriegalptal, Binntal, Valais, Switzerland

A very curious piece composed by a group of quartz crystals, one of them of greater size, with a slight smoky tone and an exceptional transparence. Black almost metallic inclusions of hematite are observed in the top faces of the crystal. Also on them. With a minor feldspar matrix. A very aesthetic specimen.


Size: 4.5 x 4.4 x 3.2 cm.
Main crystal: 37 x 14 mm.

 
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