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RM701   Metatorbernite
Cu(UO₂)₂(PO₄)₂·12H₂O
  -  8. Phosphates, arsenates and vanadates

Group of isolated and very sharp metatorbernite crystals, with an intense green grass color, showing the combination of the first and the second order dipyramids, truncated by pinacoidal faces. Its intense color gives a nice contrast with the white quartz matrix. We could say that this locality is included in the most worldwide important torbernite localities due to the crystal quality, size and multiple habits.

Size: 9,6 x 5,7 x 2,8 cm.
Main crystal: 4 x 4 mm.
Presents radioactive activity ☢.
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RM690   Sphalerite with dolomite, chalcopyrite, galena and siderite
ZnS
  -  2. Sulfides and sulfosalts

Groups of very brilliant sphalerite crystals showing complex habitus and twins. With an intense luster and deep brown color, near black, with honey reflections. They are peppered by several small but brilliant chalcopyrite crystals. On a siderite matrix, accompanied by dolomite, galena and defined brilliant chalcopyrite crystals. Nowadays, this mine, in the city of Bilbao, is collapsed and it is impossible to get these classic Spanish specimens.

Size: 8,0 x 6,7 x 4,2 cm.
Main crystal: 12 x 10 mm.
Found in 09/2003.
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RM692   Turquoise

From a recent finding in an outcrop close to the Proserpina reservoir, near of the interesting city of Mérida (Badajoz). This specimen shows small turquoise crystals forming botryoidal aggregates with a nice bluish and greenish tones, partially covered by a second generation of more yellowish crystals. We'll send a copy of the analysis to the buyer. A Spanish novelty.

Size: 8,4 x 4,7 x 2,5 cm.
Found in 2013.
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RM708   Cerussite "Jackstraw"
Pb(CO3)
  -  5. Carbonides and nitrates

A huge size and top quality "Jackstraw" cerussite specimen. The "jackstraw" habit consists of numerous randomly oriented elongated crystals. The best known locality for this "jackstraw" type are those specimens from the Flux mine, in Arizona.
It is formed by a rich group of elongated cerussite crystals with an intense white color, divergent growth and good brilliance. In a limonite matrix. Both sides are mineralized. A classic specimen from this American locality. It was adquired by Gerard Vogel (Netherlands) in 1961, in California.

Size: 9,5 x 6,1 x 4,2 cm.
Main crystal: 27 x 3 mm.
Found in 1960's.
Ex-coll. Dr. Gerard Vogel (NL).
Fluorescent under long wave UV
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RM676   Faden Quartz

Group of very sharp flattened parallel growth of quartz crystals. Very transparent, with an excellent brilliance, transparence and with a visible "faden" growth that crosses it tip to tip.
It comes from a very recent find in the alpine valley of Saint-Jean-de-Maurienne, in France, near Italy and they could be considered between the best faden quartz crystals in Europe.

Size: 5,4 x 3,1 x 1,4 cm.
Found in 08-09/2013.
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RM675   Faden Quartz

Group of very sharp flattened parallel growth of quartz crystals. Very transparent, with an excellent brilliance, transparence and with a visible "faden" growth that crosses it tip to tip.
It comes from a very recent find in the alpine valley of Saint-Jean-de-Maurienne, in France, near Italy and they could be considered between the best faden quartz crystals in Europe.

Size: 5,3 x 3,4 x 0,7 cm.
Found in 08-09/2013.
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RM674   Faden Quartz

Group of a parallel growth of very sharp flattened quartz crystals. Very transparent, with an excellent brilliance, transparence and with a visible "faden" growth that crosses it tip to tip.
It comes from a very recent find in the alpine valley of Saint-Jean-de-Maurienne, in France, near Italy and they could be considered between the best faden quartz crystals in Europe.

Size: 5,0 x 2,9 x 0,7 cm.
Found in 08-09/2013.
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RM673   Faden Quartz

Group of very sharp flattened parallel growth of quartz crystals. Very transparent, with an excellent brilliance, transparence and with a visible "faden" growth that crosses it tip to tip.
It comes from a very recent find in the alpine valley of Saint-Jean-de-Maurienne, in France, near Italy and they could be considered between the best faden quartz crystals in Europe.

Size: 7,4 x 2,0 x 0,8 cm.
Found in 08-09/2013.
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RM671   Fluorite with calcite and quartz
CaF₂
  -  3. Halides

This elegant specimen presents a cube-octahedral fluorite crystal, with well defined faces and curved edges and good size. Color from green to blue, with some zoning. It is very aerial disposed on a white quartz matrix, with pyrite in the back side, and it is accompanied, to increase its aesthetics, by a rich group of calcite crystals, with a curious banded brown tones. An unusual specimen, with an incomparable presence.

Size: 13,0 x 7,8 x 4,7 cm.
Main crystal: 22 x 22 mm.
Found in 2013.
Fluorescent under long wave UV
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RM670   Axinite-(Fe) with quartz, clinochlore and epidote
Ca4Fe2+2Al4[B2Si8O30](OH)2

Group of lanceolated axinite-(Fe) crystals, with excellent color and brilliance, very sharp and transparent. They are partially covering a matrix of quartz crystals with dark green clinochlore aggregates, also with green epidote. The specimen is much better in hand than in the picture.

Size: 6,3 x 5,3 x 3,4 cm.
Main crystal: 8 x 2 mm.
Found in 2013.
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RM668   Axinite-(Fe) with Prenhite
Ca4Fe2+2Al4[B2Si8O30](OH)2

Group of lanceolated axinite-(Fe) crystals, with excellent color and brilliance, very sharp and transparent. They are partially covering a matrix and accompanied by aggregates of yellow to white prehnite. The specimen is much better in hand than in the picture. A new find in Perú.

Size: 5,3 x 5,2 x 3,5 cm.13 x 3 mm
Main crystal: 13 x 3 mm.
Found in 2013.
Precio reducido-Reduced price 60€
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RM666   Axinite-(Fe) with quartz, clinochlore and Prenhite
Ca4Fe2+2Al4[B2Si8O30](OH)2

Group of lanceolated axinite-(Fe) crystals, with excellent color and brilliance, very sharp and transparent. They are partially covering a matrix of quartz crystals with dark green clinochlore aggregates, also with yellow prehnite. The specimen is much better in hand than in the picture. A new find in Perú.

Size: 6,0 x 4,5 x 4,5 cm.
Main crystal: 8 x 3 mm.
Found in 2013.
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RM658   Galena with sphalerite and chalcopyrite
PbS
  -  2. Sulfides and sulfosalts

Find "different" specimens from Madan is a laborious work but, sometimes, very satisfactory. In this sample we see two galena crystals of cubic habit with slightly rounded edges and faces with rare hopper growth. To add more interest we can observe in vertices octahedron faces. Good luster, metallic gray color and disposed very aerial and aesthetics on a matrix of sphalerite crystals with several twins, polysynthetic growths on faces and excellent brilliance. Also numerous brilliant chalcopyrite crystals. A different specimen from a classic Bulgarian locality.

Size: 7,8 x 4,8 x 3,8 cm.
Main crystal: 18 x 12 mm.
Found in 2013.
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RM664   Fluorite with quartz
CaF₂
  -  3. Halides

Group of fluorite crystal showing an elongated cubic prism, beveled on edges, with excellent violet color zoning. Directionally, they are partially covered with a layer of white quartz we wanted to preserve. They are very aerial disposed on a matrix covered by small but brilliant quartz crystals. They were extracted from la "coquera" (vug) called La Negrina (the black one), that appeared between March and April, 2006.

Size: 5,8 x 5,0 x 4,0 cm.
Main crystal: 13 x 10 mm.
Found in 03-04/2006.
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RM656   Fluorite quth qaurtz, schorl and feldspar
CaF₂
  -  3. Halides

Excellent specimen of fluorite showing well defined cube and octahedron forms, with a good green color and transparence. The disposition is perfect on a feldspar matrix. It is accompanied by several hyaline quartz crystals, many of them doubly terminated and some with probably rutile inclusions. Also with schorl-dravite crystals implanted in the matrix, together with small groups of hexagonal fluorapatite crystals (visible under LW-UV). A superb quality Pakistani specimen for the best fluorite collector display.

Size: 9,7 x 8,4 x 5,7 cm.
Main crystal: 24 x 20 mm.
Found in 08/2013.
Precio reducido-Reduced price 245€
Fluorescent under long wave UV
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RM657   Twinned Calcite
Ca(CO3)
  -  5. Carbonides and nitrates

A good size and exceptional Belgium calcite specimen on matrix! Transparence and very rich in faces, good honey color. We can observe the complex twinning formed by rhombohedral crystals, visible twin plane. Perfectly disposed on a calcite matrix.
This
limestone quarry has provided beautiful calcite twins which have made enjoy during years the crystallography mineral collectors. Currently access is not allowed.

Size: 10,0 x 8,5 x 4,2 cm.
Main crystal: 38 x 30 x 18 mm.
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RM661   Epidote
(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
  -  9. Silicates

A very interesting cluster of sharp epidote crystals showing a developed striated prism, some doubly terminated. Terminal faces are defined by various pinacoids. The brilliance is excellent and the deep green color, near black in thick crystals, could be perfectly observed when light crosses through them. From a Peruvian locality not well represented in collections.

Size: 3,5 x 3,4 x 2,8 cm.
Main crystal: 18 x 8 mm.
Found in 2013.
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RM663   Calcite
Ca(CO3)
  -  5. Carbonides and nitrates

A very aesthetic and huge size group of calcite crystals showing rhombohedral forms, elongated along the main axis. Good definition, yellow color, due to the iron oxide coating. From a Spanish classic locality.

Size: 10,0 x 9,7 x 6,0 cm.
Main crystal: 20 x 18 mm.
Found in 2008.
Fluorescent under long wave UV
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RM662   Calcite
Ca(CO3)
  -  5. Carbonides and nitrates

A very aesthetic group of calcite crystals showing rhombohedral forms, elongated along the main axis. Good definition, yellow color, with greater intensity at the acute forms, due to the iron oxide coating. From a Spanish classic locality.

Size: 10,5 x 5,0 x 5,0 cm.
Main crystal: 20 x 15 mm.
Found in 2008.
Fluorescent under long wave UV
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RM665   Fluorite
CaF₂
  -  3. Halides

Druse of very sharp fluorite crystals, with transparence and excellent yellow color. From a classic Spanish mine for the species.

Size: 5,5 x 5,4 x 2,2 cm.
Main crystal: 9 x 8 mm.
Found in 2012.
Precio reducido-Reduced price 60€
Fluorescent under long wave UV
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RM654   Native Copper with malachite
Cu
  -  1. Elements

An aesthetic arborescent copper specimen with several defined crystals, with good brilliance an colour. Accompanied by malachite and some quartz. From a lesser-known Zambian copper-cobalt mine. A specimen from past times.

Size: 5,4 x 3,4 x 1,5 cm.
Main crystal: 7 x 6 mm. (aggreg)
Found in ca. 1974-1976.
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RM653   Beryl (aquamarine) with muscovite and albite
Be3Al2Si6O18
  -  9. Silicates

Excellent aquamarine crystal showing a well developed prism and a very interesting termination, not very common for the species. We can see at the top, the sharp faces of the first order dipyramid, with one isolated face (curious!) of a third order dipyramid. Moreover, the apex is truncated by the pinacoid. It has a slight bluish tone, near colorless. Transparence and brilliance are very good. On the faces of the prism some groups of muscovite and albite crystals have grown. It is very vertically disposed on a white matrix of albite with muscovite, with a small another aquamarine. A gem on matrix.

Size: 5,4 x 3,5 x 3,3 cm.
Main crystal: 50 x 12 mm.
Found in 2013.
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RM651   Fluorite with quartz
CaF₂
  -  3. Halides

A rich group of well-defined cubic crystals of fluorite showing polysynthetic growth on faces. Violet-purple color is very, very intense, with geometrical zoning in the crystal core. Many of them are interpenetrating, giving the whole a unique aesthetics. From a classic Asturian locality.

Size: 9,5 x 6,5 x 5,0 cm.
Main crystal: 14 x 12 mm.
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RM652   Native copper
Cu
  -  1. Elements

A very aesthetic copper specimen formed by laminar to arborescent forms, with rounded crystals and very aerial disposed. The color is natural, withouth chemical treatments, and it shows some luster. It comes from Bolivian mine, near CoroCoro, famous for pseudomorphs of native copper after hexagonal cyclic twins of aragonite, but these laminar shape is uncommon for locality.

Size: 6,5 x 5,1 x 4,4 cm.
Found in 2012.
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RM640   Calcite with fluorite and Baryte
Ca(CO3)
  -  5. Carbonides and nitrates

Curious specimen of calcite from Moscona. Formed by some crystals, one of them predominant, with complex rhombohedrall faces with echeloned growth. Accompanied by tabular barite crystals and on a yellow fluorite matrix.

Size: 8,6 x 7,3 x 4,4 cm.
Main crystal: 28 x 25 mm.
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