HomeMineralsBlogVirtual galleryAbout RMContactUser
Language
0
You are in > Home > Minerals
RM1395   Aegirine with smoky quartz
NaFe3+Si2O6

Group of aegirine parallel growth with very elongated crystals, bright faces and very sharp and acute termination. Almost black green that makes it stand out for its aerial position on a matrix of smoky quartz crystals. A nice gem.

Size: 6.0 x 4.3 x 4.3 cm.
Main crystal: 34 x 4 mm.
Sold
RM1396   Twinned aegirine with microcline
NaFe3+Si2O6

Very elongated crystal of aegirine, brilliant, defined with clearly visible terminal faces. A very aerial and aesthetic piece.

Size: 5.8 x 5.3 x 4.0 cm.
Main crystal: 34 x 4 mm.
Sold
RM1406   Sérandite

A very aethetic miniature specimen of sérandite, showing a good salmon color. Defined and with a nice size... From the classic MSH.

Size: 2.3 x 1.3 x 0.9 cm.
Sold
RM1409   Desautelsite con artinite

A specimen for systematic collectors... A large group of needle-like colorless crystals (prismatic) of artinite, forming aesthetic rosettes. But in this sample we highlight some aggregates of desautelsite crystals, a rare manganese and magnesium carbonate found in very few locations. They are orange crystals forming groups together with the artinite.

Size: 4.3 x 1.6 x 1.8 cm.
Sold
RM1410   Desautelsite con artinite

A specimen for systematic collectors... A large group of needle-like colorless crystals (prismatic) of artinite, forming aesthetic rosettes. But in this sample we highlight some aggregates of desautelsite crystals, a rare manganese and magnesium carbonate found in very few locations. They are orange crystals forming groups together with the artinite.

Size: 4.4 x 2.4 x 1.4 cm.
Sold
RM1411   Claraite with theisite

Excellent groups formed by lamellar crystals of claraite, of an intense turquoise blue, on a matrix of dolomite and sulphides. It is accompanied by spheric aggregates of theisite crystals. Analysis results will be sent to the buyer.

Claraite is a rare copper and zinc carbonate which may contain sulfur and/or arsenic. Theisite is a rare copper and zinc arsenate-antimonate that has been described for the first time in this mine in the Catalan Pyrenees. These mineral species are the second citation in Spain.
We have published a book called "Rocabruna i el seu entorn. La mina de les Ferreres" where you could enjoy all species collected and determined until the date of publication (2014).

Size: 4.0 x 3.8 x 3.5 cm.
Found in 2015.
Sold
RM1415   Calcite with dolomite
Ca(CO3)
  -  5. Carbonides and nitrates

Very aerial calcite crystal showing the rhombohedral shape with very curious faces on edges belonging to other orders rhombohedron. Transparent to translucent, colorless and very bright. It is disposed on a matrix with dolomite. Calcite specimens from la Florida mines are known and valued worldwide. An aesthetic specimen from the Spanish mineralogy.

Size: 8.8 x 4.3 x 4.0 cm.
Main crystal: 33 x 28 mm.
Sold
RM1413   Quartz eisenkiesel (Jacinto de Compostela) with gypsum
SiO₂
  -  4. Oxides and hydroxides

Very aesthetic quartz (eisenkiesel or Jacinto de Compostela var.) crystal, showing defined faces and edges, with a good size for the locality. Perfect luster, with deep red color. In a gypsum matrix. From a different Spanish locality than usual ones.

Size: 6.3 x 4.5 x 3.5 cm.
Main crystal: 17 x 8 mm.
Excol. J.C. Tarín
Sold
RM1414   Quartz eisenkiesel (Jacinto de Compostela) with gypsum
SiO₂
  -  4. Oxides and hydroxides

Very aesthetic quartz (eisenkiesel or Jacinto de Compostela var.) crystal, showing defined faces and edges, with a good size for the locality. Perfect luster, with deep red color. In a gypsum matrix. From a different Spanish locality than usual ones.

Size: 7.2 x 5.5 x 2.8 cm.
Main crystal: 22 x 10 mm.
Found in 2016.
Sold
RM1380   Fluorite with baryte
CaF₂
  -  3. Halides

Exceptional specimen of fluorite from this classic French mine. It shows a group of cubic crystals, interpenetrating, brilliant, intense yellow-orange, translucent to transparent and tiled growths on their faces. It is accompanied by barite tabular crystals. A French classic with a brightness and superior quality for the locality.

Size: 7.0 x 6.4 x 5.0 cm.
Main crystal: 20 x 20 mm.
Excol. Guillert.
Fluorescent under long wave UV
Sold
RM1382   Fluorite with quartz
CaF₂
  -  3. Halides

Group of cubic fluorite crystals, with defined faces and edges and polysynthetic growths. Purple color with zoning, more intense on edges and good transparency. Hard to see in collections.

Size: 7.7 x 6.7 x 5.0 cm.
Main crystal: 12 x 12 cm.
Sold
RM1381   Fluorite
CaF₂
  -  3. Halides

Group of cubic fluorite crystals, with defined faces and edges and polysynthetic growths. Purple color with zoning and good transparency. Hard to see in collections.

Size: 9.2 x 7.4 x 4.0 cm.
Main crystal: 12 x 12 mm.
Sold
RM1408   Almandine

Almandine crystal, rich in faces, with forms of the dodecahedron, and rounded edges. A classic of Spanish mineralogy, nowadays very difficult to see.

Size: 4.5 x 3.0 x 2.9 cm.
Found in 1973.
Collected by Marçal Llòria.
Sold
RM1417   Aragonite on basaltic rock
Ca(CO3)
  -  5. Carbonides and nitrates

From a locality not represented in collections it is coming this specimen of aragonite. It shows aggregates of prismatic crystals, very sharp, in divergent growth, transparent and good brilliance. These specimens were collected in a nearby cliffs of two small volcanoes in the western end of the Cape Vert peninsula, near Dakar, in underground quarries. A mineral rarity.

Size: 6.0 x 6.0 x 3.4 cm.
Main crystal: 14 x 1 mm.
Fluorescent under long wave UV
Sold
RM1418   Almandine with feldspar

A nice almandine crystals, one of them dominant, from a locality not well represented in collections. Defined, with faces with staggered growth. It is disposed on a matrix of feldspar and quartz.

Size: 6.4 x 5.0 x 3.4 cm.
Main crystal: 12 x 12 mm.
Sold
RM1419   Marcasite twinned
FeS₂
  -  2. Sulfides and sulfosalts

A very rich druse of marcasite crystals those clearly show the cockscomb twin. Brilliant, defined and very aesthetic. A Spanish classic.

Size: 9.5 x 7.0 x 2.2 cm.
Main crystal: 15 x 7 mm.
Sold
RM1402   Hübnerite with quartz

An excellent old classic from the American mineralogy. Really sharp crystals of hübnerite forming groups of parallel growths, some of them isolated. With the intense brown color and brilliance and an esthetic contrast with the snowy white matrix. Nowadays, it is very difficult to find specimens with this quality or any other quality...

Size: 8.8 x 4.5 x 3.8 mm.
Main crystal: 18 x 8 mm.
Ex. Schick collection
Sold
RM1400   Bornite on pyrite
Cu5FeS4

Everybody knows about Milpillas secondary copper minerals, but this locality is not well-known by the complex pyrite crystals coated by bornite. We propose one of the few specimens I have seen. In this sample we can see the dominant forms of the cube, but also the octahedron, surrounded by trapezohedron and possibly the dodecahedron on edges. Bright and well disposed in a solid matrix. It is a true crystallographic gem.

Size: 8.0 x 6.5 x 5.7 cm.
Main crystal: 18 x 18 mm.
Sold
RM1401   Rutile with quartz

An amazing rutile specimen with an exceptional quality for the locality and for the species. The famous rutile specimens of Kapudzhukh in Azerbaijan are already a classic. It is said, they appeared during the 90s, for only a period of two years. This specimen shows perfect faces, first and second order twins and dipyramids, and a more than outstanding definition.
According to explained by Rob Lavinsky, a limited number of pieces were collected during this short period. They were send to United States, at the hands of Bill Larson, through a former official of the KGB, nicknamed "Niki the Tank", who got into mineral collecting and dealing after the Wall fell. Honestly, this is one of those pieces that you dubt to keep or come off it...

Size: 6.2 x 5.4 x 4.5 cm.
Main crystal: 15 x 12 mm.
Found in 1990's
Sold
RM1399   Pyromorphite
Pb₅(PO₄)₃Cl
  -  8. Phosphates, arsenates and vanadates

Specimens of Bulgarian pyromorphite appear very rarely and collectors ususally don't lose chance to get them. In this fine sample we have a matrix partially covered by pyromorphite crystals showing the hexagonal prism and pinacoidal defined faces. Color is one of the characteristics of these pieces, a brown tone, slightly reddish, with some zoning. A magnificent chance to get a specimen from this mine.

Size: 7.7 x 6.4 x 3.8 cm.
Main crystal: 12 x 4 mm.
Sold
RM1398   Globular Mimetite

Rich group of globular aggregates of mimetite, with an intense orange color. It comes from an area of the German Black Forest where nowadays it is forbidden collect minerals.

Size: 5.4 x 4.2 x 2.7 cm.
Main crystal: 10 mm. glob.
Sold
RM1397   Autunite and torbernite
Ca(UO2)2(PO4)2·10-12H2O

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.
Sold
RM1392   Kamotoite-(Y)

The kamotoite-(Y) are the intense yellow crystalline sprays, with individual flat-laying crystals to 5 mm. brilliant and transperent. In the same sample we can observe probably a small vein of yellow to orange brilliant uranophane. Kamoto is the Type Locality for the species. A very rare uranium and ytrium mineral from Katanga.

Size: 2.5 x 2.3 x 2.0 cm.
Main crystal: 5 mm.
Mineral analizado - Analyzed specimen
Presents radioactive activity.
Sold
RM1391   Aegirine, quartz and microcline
NaFe3+Si2O6

Group of sharp aegirine crystals in parallel growth, with striated prismatic shapes and sharp terminals. Good brilliance and very dark green, almost black. With a small quartz and feldspar matrix.

Size: 6.5 x 4.4 x 4.0 cm.
Main crystal: 55 mm.
Sold
RM1393   Smoky quartz with aegirine and microcline
SiO₂
  -  4. Oxides and hydroxides

Group of smoky quartz crystals where one stands out for its development, brilliance and a very uniform smoky tone. Accompanied by prismatic black aegirine crystals, bright and with defined faces and edges. On a matrix of feldspar (microcline). Very aesthetic piece.

Size: 5.8 x 5.5 x 4.2 cm.
Main crystal: 37 x 8 mm.
Sold