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RQ62H8: Cassiterite with Quartz
The locality is very little known for Cassiterite. The crystals, some of them doubly terminated, are prismatic, twinned and in matrix. Their color is unusually clear and they are well-defined.
Mirandela, Bragança, Alto Douro  Portugal (±1980)
Specimen size: 3.4 × 2.6 × 1.4 cm = 1.34” × 1.02” × 0.55”
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MT99X8: Cassiterite with Quartz
Very aerial group, on Quartz matrix, of cyclic-twinned Cassiterite crystals. They are bright and show very well defined faces and edges. The sample, as well as its mineralogical quality, is especially esthetic.
Viloco Mine, Loayza Province, La Paz Department  Bolivia (2012)
Specimen size: 5.4 × 5.4 × 4.3 cm = 2.13” × 2.13” × 1.69”

Main crystal size: 2 × 1.7 cm = 0.79” × 0.67”
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HM280TM: Cassiterite with Quartz and Calcite
Druse of twinned Cassiterite crystals, translucent, with very bright luster and partially covered by small Calcite and Quartz crystals.
Viloco Mine, Loayza Province, La Paz Department  Bolivia
Specimen size: 10.6 × 10.1 × 3.2 cm = 4.17” × 3.98” × 1.26”
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TXH46AP5: Cassiterite with Quartz and Mica
Group of twinned Cassiterite crystals, one of them clearly dominant, with sharp crystal forms, lustrous, on matrix, something not very common in specimens from this classic locality. The specimen comes from the collection of Robert-Auguste Touchon.
La Villeder, Le Roc-Saint-André, Vannes, Morbihan, Brittany/Bretagne  France
Specimen size: 2.8 × 2.7 × 2 cm = 1.10” × 1.06” × 0.79”

Main crystal size: 2.2 × 1.2 cm = 0.87” × 0.47”
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TTE46AP5: Cassiterite with Quartz and Mica
Twinned Cassiterite crystal with sharp crystal forms, lustrous, on matrix, something not too common in specimens from this classic locality. The specimen comes from the collection of Robert-Auguste Touchon, whose handwritten label we will send to the buyer.
La Villeder, Le Roc-Saint-André, Vannes, Morbihan, Brittany/Bretagne  France
Specimen size: 3.4 × 3 × 2.4 cm = 1.34” × 1.18” × 0.94”
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EEB92AP5: Cassiterite with Quartz and Mica
Twinned Cassiterite crystal with very sharp crystal forms, transparent dark brown, with an extraordinarily bright luster, in a very aerial position on a matrix of Quartz crystals with leafy Mica aggregates.
Yalian Township, Yongde, Lincang, Yunnan Province  China (2022)
Specimen size: 7.4 × 5.8 × 4.6 cm = 2.91” × 2.28” × 1.81”

Main crystal size: 2 × 1.8 cm = 0.79” × 0.71”
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NB11M0: Cassiterite with Quartz and Muscovite
A very neat Cassiterite twin, with the classic habit of the Penouta specimens. On a Quartz matrix with Muscovite.
Penouta Mines, Penouta (San Bartolomé), Viana do Bolo, Comarca Viana, Orense / Ourense, Galicia / Galiza  Spain (±1998)
Specimen size: 4.5 × 4.2 × 2.1 cm = 1.77” × 1.65” × 0.83”
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DJ27AF9: Cassiterite with Quartz and Siderite
Group of very bright Cassiterite crystals with very visible multiple twinning, on matrix with clear Quartz crystals and partially coated by Siderite.
It was previously in the Folch collection and it probably was an exchange.
Minas da Panasqueira, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro  Portugal
Specimen size: 3.2 × 2.8 × 2.4 cm = 1.26” × 1.10” × 0.94”

Main crystal size: 1.5 × 1.2 cm = 0.59” × 0.47”
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RK49K4: Cassiterite with Quartz and Siderite
Great group of flat Cassiterite crystals. They are twinned, very bright and with small, very clear, crystals of Quartz on a matrix with lenticular crystals of Siderite. On the original label is written the year 1964.
Minas da Panasqueira, level 2, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro  Portugal (±1964)
Specimen size: 11.4 × 4.4 × 2.2 cm = 4.49” × 1.73” × 0.87”
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RZ26T8: Cassiterite with Quartz and Siderite
Very bright twinned crystals of Cassiterite, with neat transparency and implanted on a group of transparent Quartz crystals. We believe that this sample is not from the classic mining area of Panasqueira but from a nearby zone named “Vale da Ermida” as its appearance matches exactly the shape of the samples found there several years ago.
Vale da Ermida, Panasqueira, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Centro  Portugal (±1964)
Specimen size: 8 × 5 × 6.2 cm = 3.15” × 1.97” × 2.44”

Main crystal size: 1.2 × 1.1 cm = 0.47” × 0.43”
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AD96Y6: Cassiterite with Quartz and Siderite
Group of bright Cassiterite crystals forming complex cyclic twins. They are on a matrix of transparent Quartz crystals with some rough Siderite. This sample was in the Folch duplicates collection, whose label we’ll send to the buyer. It has an added interest because it is from Vale da Ermida, a zone somewhat away from the main mining area and is currently abandoned and awash.
Vale da Ermida, Panasqueira, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Centro  Portugal (±1964)
Specimen size: 7.7 × 5.7 × 4.9 cm = 3.03” × 2.24” × 1.93”
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RE60V1: Cassiterite with Quartz, Dolomite and Tourmaline
Twinned crystals of Cassiterite. They are translucent and bright and are on matrix, with Quartz, Dolomite and small acicular crystals of tourmaline (Schorl-Dravite)
Minas da Panasqueira, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro  Portugal (±1972)
Specimen size: 5.8 × 4.1 × 4.5 cm = 2.28” × 1.61” × 1.77”

Main crystal size: 0.5 × 0.5 cm = 0.20” × 0.20”
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TR96AL3: Cassiterite with Quartz, Fluorapatite and Arsenopyrite
Groups of twinned Cassiterite crystals, very sharp, shiny and translucent on the edges. On matrix, with short elongated Fluorapatite crystals of almost white color, aggregates of elongated crystals of Arsenopyrite and Quartz crystals.
Minas da Panasqueira, level 1, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro  Portugal (2018)
Specimen size: 10.4 × 6.8 × 3.9 cm = 4.09” × 2.68” × 1.54”
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RZ6G2: Cassiterite with Scheelite
The locality is very poorly-known and well crystallized samples are very scarce. In this specimen, Cassiterite forms a perfectly defined elbow twin, in a matrix very rich with Scheelite.
Cerro del Vidrio, Montoro, Comarca Alto Guadalquivir, Córdoba, Andalusia  Spain
Specimen size: 4 × 2.8 × 2.3 cm = 1.57” × 1.10” × 0.91”

Main crystal size: 0.8 × 0.6 cm = 0.31” × 0.24”
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JFD142AO6: Cassiterite with Sphalerite, Quartz and Siderite
One hell of a Cassiterite! Very large for Panasqueira, very lustrous, and sitting well on Sphalerite crystals that are associated with Quartz crystals, one of them broken, but the others recrystallized, and with small Siderite crystals. Who said that Panasqueira cassiterites did not reach world class status?
Minas da Panasqueira, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro  Portugal (±1970)
Specimen size: 10.8 × 9.7 × 4.1 cm = 4.25” × 3.82” × 1.61”
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RJ47F8: Cassiterite with Zinkenite
A group of Cassiterite twins, very typical of Cornwall and on matrix. Needle crystals of Zinkenite accompany the Cassiterite. Although the mine that it is from is not given, it is the type of specimen that is hard to find.
Cornwall  England / United Kingdom (±1926)
Specimen size: 6 × 4.8 × 2.7 cm = 2.36” × 1.89” × 1.06”

Main crystal size: 1.2 × 1.2 cm = 0.47” × 0.47”
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TPA87AN5: Catapleiite
Group of sharp Catapleiite crystals between lamellar and tabular, unusually separated from each other, with very well defined faces and edges, transparent, with bright luster and a lemon-yellow color. In addition, they are in matrix, which is rare. We will ship the specimen, from one of the great classic localities for this rare cyclosilicate, in its original Perky box from the Robert J. (Bob) Noble collection, which also contains the label.
Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec  Canada
Specimen size: 3 × 2.8 × 1.6 cm = 1.18” × 1.10” × 0.63”
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MG47AM6: Catapleiite with Aegirine inclusions and Siderite
Very sharp Catapleiite crystal, transparent, lustrous, colorless, with inclusions of Aegirine crystals, on matrix, with rhombohedral Siderite crystals. The specimen is from the most classic locality for the species. We will send the buyer the specimen in its original perky box from the Robert J. Noble collection, which also contains the label.
Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec  Canada
Specimen size: 2.2 × 1.5 × 1.2 cm = 0.87” × 0.59” × 0.47”

Main crystal size: 1.8 × 1 cm = 0.71” × 0.39”
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JC6J7: Cavansite on Stilbite
Cavansite forms groups and isolated acicular crystals of an intense blue color that cover a group of crystals of Stilbite. An original sample.
Wagholi Quarry, Wagholi, Pune District (Poonah District), Maharashtra  India (±2003)
Specimen size: 8.7 × 5 × 4.2 cm = 3.43” × 1.97” × 1.65”
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MM16S7: Cavansite on Stilbite
Very well defined spherical growth of small dipyramidal crystals of Cavansite, on a matrix of basalt coated by crystals of Stilbite.
Wagholi Quarry, Wagholi, Pune District (Poonah District), Maharashtra  India
Specimen size: 8.5 × 7.9 × 4.7 cm = 3.35” × 3.11” × 1.85”

Main crystal size: 1.6 × 1.4 cm = 0.63” × 0.55”
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MX76V0: Cavansite with Calcite
Group of very sharp crystals of Cavansite with a very intense color and luster and some of them doubly terminated, with four rhombohedral crystals of Calcite, transparent and with a clear yellow color. One of the few samples found with this association.
Wagholi Quarry, Wagholi, Pune District (Poonah District), Maharashtra  India (2008)
Specimen size: 2.4 × 2.1 × 1.8 cm = 0.94” × 0.83” × 0.71”
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MY27V0: Cavansite with Calcite
Floater spheroidal aggregate of Cavansite crystals with a very intense color and luster, with four very acute rhombohedral crystals of Calcite that are transparent, with vivid yellow color. One of the few samples found with this association.
Wagholi Quarry, Wagholi, Pune District (Poonah District), Maharashtra  India (2008)
Specimen size: 2 × 2 × 1.6 cm = 0.79” × 0.79” × 0.63”

Main crystal size: 1.2 × 0.6 cm = 0.47” × 0.24”
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ED17G3: Cavansite with Calcite and Stilbite
The specimen is really aesthetic. Cavansite crystallizes as numerous spherical groups, and as some single sprays of crystals, of a very vivid and deep color. We must mention the presence of a crystal of Calcite, very aerial, on the Cavansite.
Wagholi Quarry, Wagholi, Pune District (Poonah District), Maharashtra  India (2005)
Specimen size: 6.2 × 5.8 × 5 cm = 2.44” × 2.28” × 1.97”
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MQ12S7: Cavansite with Stilbite
Groups of very bright blue acicular crystals on doubly terminated crystals of white Stilbite on basaltic matrix.
Wagholi Quarry, Wagholi, Pune District (Poonah District), Maharashtra  India
Specimen size: 7 × 5.9 × 6.2 cm = 2.76” × 2.32” × 2.44”
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JB87E8: Cavansite with Stilbite
Unlike other Cavansites this one has thick tabular crystals that are well separated from each other and are very luminous. They are perfect and well positioned on the Stilbite matrix. Much better than many of the other Cavansites we have seen.
Wagholi Quarry, Wagholi, Pune District (Poonah District), Maharashtra  India (±2001)
Specimen size: 8 × 6.8 × 4 cm = 3.15” × 2.68” × 1.57”

12689 results found. 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