HomeMineralsBlogVirtual galleryAbout RMContactUser
Language
0
You are in > Home > Minerals
RM2435   Pyrolusite replacing manganite

These specimens of manganite partially replaced pyrolusite, come from a locality not yet described in the mineralogical bibliography. This deposit is located in the province of Boulemane, in the Fez-Meknés region, about ten kilometers from the well-known Aouli mines. It is a formation very similar to that of Imini (near Ouarzazate). These manganese deposits, both in Imini and in the Boulemane area, were formed in a karst system. Associated with shallow marine dolomites of the Cretaceous age and that currently form sub-horizontal mantles cutted by erosion, overlaping areas of volcanic rocks. Manganese minerals are found in dolomite breccia and ferruginous clays. We have carried out X-ray diffraction studies showing us the presence of both species: manganite and pyrolusite.

Size: 8.4 x 5 x 3.5 cm.
Main crystal: 3.3 cm.
Found in 03/2020
Analyzed specimen with report
Sold
RM2427   Zunyite and hematite

Very well defined zunyite crystals, with luster and on matrix. The intense tile colour is due to hematite inclusions. With clean tetrahedron shape, truncated by cube faces. The edge of both tetrahedrons measures 8 mm. They are included in a small matrix of hematite. A crystallographic specimen of this mineral species, a rare aluminum chlorine sorosilicate with fluorine. We performed some X-ray diffraction studies that confirmed the species. We recommend an interesting article about this Iranian deposit in the magazine Rocks and Minerals (Vol. 95, nº 2, 2020).

Size: 3.8 x 2.7 x 1 cm.
Main crystal: 8 mm edge.
Analyzed specimen with report
Sold
RM2426   Zunyite and hematite

Very well defined zunyite crystal, with luster and on matrix. Its intense colour is due to hematite inclusions. With very clean tetrahedron shape, truncated by cube faces. The edge of the tetrahedron measures 8 mm. It is included in a matrix of hematite. A crystallographic specimen of this mineral species, a rare aluminum chlorine sorosilicate with fluorine. We performed some X-ray diffraction studies that confirmed the species. We recommend an interesting article about this Iranian deposit in the magazine Rocks and Minerals (Vol. 95, nº 2, 2020).

Size: 5.5 x 5.2 x 4 cm.
Main crystal: 8 mm edge.
Analyzed specimen with report
Sold
RM2417   Cinnabar and quartz

Various complex cinnabar crystals, some with a cyclic twin, one of them clearly dominant. Excellent luster and intense red color, stand out on the quartz matrix from which the calcite has been removed. This mine was worked until the early 1970s. A Spanish classic that is not easy to find in the market.

Size: 6.6 x 3.2 x 1.8 cm.
Main crystal: 6 mm.
Sold
RM2420   Epidote

Group of fan-shaped prismatic epidote crystals, brilliant and with an intense green color. These specimens come from a not well-known quarry, close to Medina de Pomar, in Burgos, from a quarry where the ofites have been mined by the company Minera Ofitas del Norte.

Size: 8.5 x 4.4 x 3.8 cm.
Main crystal: 1 cm.
Reserved
RM2419   Epidote

Rich group of fan-shaped prismatic epidote crystals, brilliant and with an intense green color. These specimens come from a not well-known quarry, close to Medina de Pomar, in Burgos, from a quarry where the ofites have been mined by the company Minera Ofitas del Norte.

Size: 9.1 x 7.5 x 3.2 cm.
Main crystal: 1.2 cm.
Sold
RM2416   Epidote

Rich group of fan-shaped prismatic epidote crystals, brilliant and with an intense green color. These specimens come from a not well-known quarry, close to Medina de Pomar, in Burgos, from a quarry where the ofites have been mined by the company Minera Ofitas del Norte.

Size: 6.2 x 4.8 x 1.8 cm.
Main crystal: 1.1 cm.
Sold
RM2415   Covellite

Laminar rosette-shaped covellite crystals, excellent luster and with an intense violet to purple color, with an aesthetic iridescence. They are disposed on a matrix with pyrite and quartz. The covellite crystal specimens from Butte are highly appreciated by collectors and possibly the best in the world for the species, with only a few exceptions like Sardinia ones, but even those are not as sharp. The quality of this piece is simply excellent. Nowadays, specimens with this fine crystals are rarely seen.

Size: 9.2 x 8.5 x 4 cm.
Main crystal: 2.2 cm.
Found in ca. 1941.
Classic locality
Sold
RM2418   Fluorite and Calcite
CaF₂
  -  3. Halides

Group of cubic fluorite crystals, slightly bevelled, with an intense violet color with geometric zoning, between transparent and translucent. They show polysynthetic growths forming tiled structures on the faces of the cube. On some fluorite crystals, a generation of small scalenohedral calcite crystals, very transparent and bright, has formed. They are disposed on a matrix with baryte and calcite. Not very common in the market. They show some fluorescence under ultraviolet light.

Size: 5.2 x 4.8 x 3.6 cm.
Main crystal: 0.9 cm.
Fluorescent under LW-UV and SW-UV lights
Sold
RM2414   Fluorite and Calcite
CaF₂
  -  3. Halides

Group of cubic fluorite crystals, slightly bevelled, with an intense violet color with geometric zoning, between transparent and translucent. They show polysynthetic growths forming tiled structures on the faces of the cube. On some fluorite crystals, a generation of small scalenohedral calcite crystals, very transparent and bright, has formed. They are disposed on a matrix with baryte and calcite. Not very common in the market. They show some fluorescence under ultraviolet light.

Size: 8.2 x 5.2 x 4 cm.
Main crystal: 1.2 cm.
Fluorescent under LW-UV and SW-UV lights
Sold
RM2413   Stibnite and calcite
Sb₂S₃
  -  2. Sulfides and sulfosalts

This Leonese mine is near the Riaño reservoir. In this specimen we can see various radial aggregates of acicular prismatic stibnite crystals, with an intense luster and disposed in a calcite matrix that include them. In 1909 Spanish Mining Statistics, indicates the demarcation of 22 properties in this area with the name of "María Teresa" mine (document Nr. 3,260), of antimony, in the name of Policarpo Herrero, domiciled in Oviedo (FMF). A very fine and representative specimen.

Size: 6.3 x 6.2 x 2.4 cm.
Main crystal: 1.8 cm.
Found in 2019
Sold
RM2412   Malachite and calcite
Cu₂(CO₃)(OH)₂
  -  5. Carbonides and nitrates

Globular aggregates of malachite, with an intense green color, brilliant and that stand out on a matrix of calcite. A specimen from Tsumeb and belonging from the Manchion collection (Barcelona).

Size: 7.2 x 4.8 x 4.3 cm.
Main crystal: 0.5 cm.
Classic locality
Sold
RM2284   Vanadinite on matrix
Pb₅(VO₄)₃Cl
  -  8. Phosphates, arsenates and vanadates

On a recent trip to this mining area, we found these new specimens with incredible aesthetics. They were found in a singular cavity, opened in the depths of a 24-meter well, in Coud'a shafts. They have a more than exceptional brilliance, probably due to a last phase of crystallization in which a thin layer of almost transparent vanadinite was deposited. Crystals are very well defined, with staggered axial growths in the prism and with color zoning, more orange than red. Contrasting on a solid rocky matrix. Vanadinites from the Mibladen area are well known worldwide and although we have seen many of them, they never cease to amaze us. Amazing specimens!

Size: 10 x 8.5 x 7 cm.
Main crystal: 1.2 cm.
Found in 02/2020.
Reserved
RM2283   Stalactitic Vanadinite
Pb₅(VO₄)₃Cl
  -  8. Phosphates, arsenates and vanadates

On a recent trip to this Moroccan mining area, we found these stalactitic specimens of vanadinite with incredible aesthetics. They were found in a singular cavity, opened in the depths of a 24-meter well, in the Coud'a shafts area. They have a really good brilliance. Crystals show attractive stalactitic growths, also uneven developments in the directions of the prism, very well defined, interpenetrated and with some color zoning. Vanadinite specimens from Mibladen area are well known iworlwide and although we have seen many, they never cease to amaze us. Exceptional specimens.

Size: 5 x 4.6 x 3.5 cm.
Found in 02/2020.
Sold
RM2282   Vanadinite
Pb₅(VO₄)₃Cl
  -  8. Phosphates, arsenates and vanadates

On a recent trip to this mining area, we found these new specimens with incredible aesthetics. They were found in a singular cavity, opened in the depths of a 24-meter well, in Coud'a shafts. They have a more than exceptional brilliance, probably due to a last phase of crystallization in which a thin layer of almost transparent vanadinite was deposited. Crystals are very well defined, with staggered axial growths in the prism and with color zoning, more orange than red. Vanadinites from the Mibladen area are well known worldwide and although we have seen many of them, they never cease to amaze us. Amazing specimens!

Size: 11 x 7 x 3.8 cm.
Main crystal: 2 cm.
Found in 02/2020.
Sold
RM2281   Vanadinite
Pb₅(VO₄)₃Cl
  -  8. Phosphates, arsenates and vanadates

On a recent trip to this mining area, we found these new specimens with incredible aesthetics. They were found in a singular cavity, opened in the depths of a 24-meter well, in Coud'a shafts. They have a more than exceptional brilliance, probably due to a last phase of crystallization in which a thin layer of almost transparent vanadinite was deposited. Crystals are very well defined, with staggered axial growths in the prism and with color zoning, more orange than red. On a solid rocky matrix. Vanadinites from the Mibladen area are well known worldwide and although we have seen many of them, they never cease to amaze us. Really amazing specimen!!!

Size: 15 x 12 x 4 cm.
Main crystal: 2,2 cm.
Found in 02/2020.
Sold
RM2280   Stalactitic Vanadinite "Coud'a Star"
Pb₅(VO₄)₃Cl
  -  8. Phosphates, arsenates and vanadates

On a recent trip to this Moroccan mining area, we found these stalactitic specimens of vanadinite with incredible aesthetics. They were found in a singular cavity, opened in the depths of a 24-meter well, in the Coud'a shafts area. They have a really good brilliance. Crystals show attractive stalactitic growths, also uneven developments in the directions of the prism, very well defined, interpenetrated and with some color zoning. A stalactitic growth shows that there is nothing inside...Curious. Vanadinite specimens from Mibladen area are well known iworlwide and although we have seen many, they never cease to amaze us. Exceptional specimens.

Size: 7.2 x 5.5 x 2.2 cm.
Found in 02/2020.
Sold
RM2279   Stalactitic Vanadinite
Pb₅(VO₄)₃Cl
  -  8. Phosphates, arsenates and vanadates

On a recent trip to this Moroccan mining area, we found these stalactitic specimens of vanadinite with incredible aesthetics. They were found in a singular cavity, opened in the depths of a 24-meter well, in the Coud'a shafts area. They have a really good brilliance. Crystals show attractive stalactitic growths, also uneven developments in the directions of the prism, very well defined, interpenetrated and with some color zoning. Vanadinite specimens from Mibladen area are well known iworlwide and although we have seen many, they never cease to amaze us. Exceptional specimens.

Size: 5.7 x 3 x 1.8 cm.
Found in 02/2020.
180 €
RM2278   Vanadinite stalactitic
Pb₅(VO₄)₃Cl
  -  8. Phosphates, arsenates and vanadates

On a recent trip to this Moroccan mining area, we found these stalactitic specimens of vanadinite with incredible aesthetics. They were found in a singular cavity, opened in the depths of a 24-meter well, in the Coud'a shafts area. They have a really good brilliance. Crystals show attractive stalactitic growths, also uneven developments in the directions of the prism, very well defined, interpenetrated and with some color zoning. Vanadinite specimens from Mibladen area are well known iworlwide and although we have seen many, they never cease to amaze us. Exceptional specimens.

Size: 5.2 x 3.8 x 3 cm.
Found in 02/2020.
190 €
RM2277   Vanadinite
Pb₅(VO₄)₃Cl
  -  8. Phosphates, arsenates and vanadates

On a recent trip to this mining area, we found these new specimens with incredible aesthetics. They were found in a singular cavity, opened in the depths of a 24-meter well, in Coud'a shafts. They have a more than exceptional brilliance, probably due to a last phase of crystallization in which a thin layer of almost transparent vanadinite was deposited. Crystals are very well defined, with staggered axial growths in the prism and with color zoning, more orange than red. Contrasting on a solid rocky matrix. Vanadinites from the Mibladen area are well known worldwide and although we have seen many of them, they never cease to amaze us. Amazing specimens!

Size: 8.5 x 7 x 6.5 cm.
Main crystal: 1.6 cm.
Found in 02/2020.
Sold
RM2276   Vanadinite
Pb₅(VO₄)₃Cl
  -  8. Phosphates, arsenates and vanadates

On a recent trip to this mining area, we found these new specimens with incredible aesthetics. They were found in a singular cavity, opened in the depths of a 24-meter well, in Coud'a shafts. They have a more than exceptional brilliance, probably due to a last phase of crystallization in which a thin layer of almost transparent vanadinite was deposited. Crystals are very well defined, with staggered axial growths in the prism and with color zoning, more orange than red. They contrast on a solid matrix. Vanadinites from the Mibladen area are well known worldwide and although we have seen many of them, they never cease to amaze us. Exceptional specimens!

Size: 9 x 5 x 4 cm.
Main crystal: 1.6 cm.
Found in 02/2020.
Sold
RM2275   Vanadinite
Pb₅(VO₄)₃Cl
  -  8. Phosphates, arsenates and vanadates

On a recent trip to this mining area, we found these new specimens with incredible aesthetics. They were found in a singular cavity, opened in the depths of a 24-meter well, in Coud'a shafts. They have a more than exceptional brilliance, probably due to a last phase of crystallization in which a thin layer of almost transparent vanadinite was deposited. Crystals are very well defined, with staggered axial growths in the prism and with color zoning, more orange than red. Vanadinites from the Mibladen area are well known worldwide and although we have seen many of them, they never cease to amaze us. Amazing specimens!

Size: 9 x 8.5 x 3.8 cm.
Main crystal: 2 cm.
Found in 02/2020.
Sold
RM2274   Vanadinite
Pb₅(VO₄)₃Cl
  -  8. Phosphates, arsenates and vanadates

On a recent trip to this mining area, we found these new specimens with incredible aesthetics. They were found in a singular cavity, opened in the depths of a 24-meter well, in Coud'a shafts. They have a more than exceptional brilliance, probably due to a last phase of crystallization in which a thin layer of almost transparent vanadinite was deposited. Crystals are very well defined, with staggered axial growths in the prism and with color zoning, more orange than red. Vanadinites from the Mibladen area are well known worldwide and although we have seen many of them, they never cease to amaze us. Exceptional specimens!

Size: 18 x 10 x 4.7 cm.
Main crystal: 2.4 cm.
Found in 02/2020.
Classic locality
750 €
RM2273   Galena and Baryte
PbS
  -  2. Sulfides and sulfosalts

Galena crystals from the Mibladen mines are not easy to see today, least of all with this definition. They are cubic crystals, with well-marked faces and edges. Some interpenetrated, some very aerial. They are arranged on a matrix with baryte rosettes.

Size: 10 x 4.5 x 4 cm.
Main crystal: 6 mm.
Found in ca. 1980.
Col. Arguijo (L'Hospitalet de Llobregat, Barcelona)
Classic locality
Sold
RM2268   Azurite
Cu3(CO3)2(OH)2

Specimen of azurite with a very special, intense color, formed by numerous small crystals, very brilliant. On baryte matrix. They belong to the mine that exploits the immense Marabout vein, located in the north of Sidi Ayed. The coordinates of the mine are 32°53'23''N, 4°38'33''W. Near from Mibladen but in the other side of the mountains.

Size: 6.5 x 3.5 x 3 cm.
Found in 02/2018.
Sold