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TG97N0: Turquoise pseudo Apatite with Muscovite

A curious pseudomorph in which Turquoise completely replaces Apatite but clearly preserving the shape and the forms of the prism and the pyramid of the pre-existing Apatite crystal.
Mina la Caridad, La Caridad, Nacozari Garcia, Sonora, Sonora Mexico
Specimen size: 6.7 × 4.7 × 4.3 cm = 2.64” × 1.85” × 1.69”

MP48AK3: Turquoise with Pyrite

Turquoise nodule, with very aesthetic cavities and relief, sky blue, with Pyrite inclusions, and of unusual size. The specimen is from a classic district for the species.
Reina Mine (Turquesa Mine), El Aguajito, Ensenada, El Rosario District, Municipio Ensenada, Baja California Mexico
Specimen size: 6.6 × 5.6 × 4.2 cm = 2.60” × 2.20” × 1.65”

NA57L2: Turquoise with Wavellite

The phosphate deposit of Palazuelo de las Cuevas (Zamora, Spain) is well known for the presence of Variscite. This mineral was mined by Prehistoric man. Variscite occasionally is accompanied by Turquoise, Wavellite and other phosphates. In this specimen the coating of Turquoise, as small globular and leafy microcrystal blue greenish aggregates, contrasts with the botryoidal Wavellite. We’ll provide a copy of the analysis to the buyer.
Palazuelo de las Cuevas, San Vicente de la Cabeza, Comarca Aliste, Zamora, Castile and León Spain (1993)
Specimen size: 4 × 3.7 × 2 cm = 1.57” × 1.46” × 0.79”

EC26AD8: Twinned Aegirine with Feldspar anz Zircon

A considerably large Aegirine crystal with very well defined faces and edges, with good terminations and a unique characteristic, a very well defined and visible frontal twin, not previously noted at Mount Malosa, as far as we know. The twinned crystal is on a matrix of white feldspar crystals and its back is partially coated by small Zircon crystals, many of them doubly terminated.
Mount Malosa, Zomba District Malawi (2014)
Specimen size: 15 × 11.8 × 11.2 cm = 5.91” × 4.65” × 4.41”

Main crystal size: 13 × 6.8 cm = 5.12” × 2.68”

TT80AB8: Twinned Albandite

Aggregate of very sharp octahedral crystals with the very well defined spinel law twin. They are bright and are on matrix, with Rhodochrosite.
The sample is with a label from the Robert Noble collection that we’ll send to the buyer.
Uchucchacua Mine, Oyón Province, Lima Department Peru
Specimen size: 5.3 × 4.9 × 3.3 cm = 2.09” × 1.93” × 1.30”

RY30F8: Twinned Bournonite with Quartz

Extraordinary specimen. The cogwheel twin, along with some other smaller ones, is perfectly placed on the matrix and has maintained its brilliance over the years. The locality is also wonderful: Herodsfoot Mine. To add even more to its glory it was bought from Sir Arthur Russell in 1926.
This specimen's photo has been reviewed and published in the magazine ‘Mineralogical Record’ on page 459 in the volume 43, number 4
Herodsfoot Mine, Lanreath, Liskeard, Cornwall England / United Kingdom (±1926)
Specimen size: 5.2 × 2.7 × 3.3 cm = 2.05” × 1.06” × 1.30”

Main crystal size: 2.5 × 1.7 cm = 0.98” × 0.67”

5TC37F3: Twinned Calcite

Although Calcite is a common species, that does not always hold true globally. This is a novelty for Madagascar since its discovery in August 2004, an aggregate that highlights the sharpness of its crystals, their color and luster and, especially, the appearance of extraordinarily unusual twins formed by the interpenetration of two rhombohedra.
Basalt Quarry, Ambariomiambana, Sambava District, Sava Region Madagascar (08/2004)
Specimen size: 5.2 × 3.3 × 2.3 cm = 2.05”

TMG97AN3: Twinned Calcite

A 'butterfly' twin of two very sharp Calcite crystals, with geometric bands of different intensities of red color due to Hematite inclusions. Interestingly similar to the classic English twinned Calcites from the Bigrigg area. The specimen is from the Alain Martaud collection.
Vaiges, Meslay-du-Maine, Mayenne, Mayenne Department, Pays de la Loire France
Specimen size: 7.4 × 7.1 × 2.4 cm = 2.91” × 2.80” × 0.94”

AM47Z0: Twinned Calcite

Aggregate of twinned and complex Calcite crystals with the clearly dominant scalenohedron. They are transparent, bright and come from a Portuguese locality from which usually are not many samples.
Cantera Vale Rodrigues, Moita do Poço, Turquel, Alcobaça, Leiria Portugal (2009)
Specimen size: 10.6 × 8.2 × 4.8 cm = 4.17” × 3.23” × 1.89”

SG28AB6: Twinned Calcite

Very Sharp butterfly Calcite twin, transparent, bright with oriented red Hematite micro-inclusions. An excellent English classic. As is the case with so many specimens in this collection, the sample is of great quality for the locality.
Egremont, West Cumberland Iron Field, former Cumberland, Cumbria England / United Kingdom
Specimen size: 4.9 × 4.2 × 2.1 cm = 1.93” × 1.65” × 0.83”

Main crystal size: 3.6 × 2.9 cm = 1.42” × 1.14”

ET27AA4: Twinned Calcite

Aggregate of lenticular Calcite crystals, the largest with the prism faces more developed. The crystals are translucent, their color is between yellow and orange and they have a gray color zoning. As in so many specimens in this collection, the sample is of great quality for the locality.
La Sambre Quarry, Landelies, Montigny-le-Tilleul, Hainaut Province, Wallonia Region Belgium
Specimen size: 7.4 × 5.7 × 3.1 cm = 2.91” × 2.24” × 1.22”

N7CH5: Twinned Calcite

The crystal is transparent, doubly terminated and it is on matrix. Faces and edges are very sharp and clearly show two twinned scalenohedra. A curiosity from a mine very famous for its Fluorites.
Coroña Shaft, Josefa-Veneros Norte vein, La Collada mining area, zona minera de La Collada, Siero, Comarca Oviedo, Principality of Asturias (Asturias) Spain (1980)
Specimen size: 4.9 × 4.3 × 1.8 cm = 1.93” × 1.69” × 0.71”

Main crystal size: 2.2 × 1 cm = 0.87” × 0.39”

N12XBH5: Twinned Calcite

The sample is especially esthetic. It has doubly terminated yellowish crystals of a considerable size. Faces and edges are very defined and clearly show the interpenetration of two rhombohedra. A curiosity from a mine very famous for its Fluorites.
Coroña Shaft, Josefa-Veneros Norte vein, La Collada mining area, zona minera de La Collada, Siero, Comarca Oviedo, Principality of Asturias (Asturias) Spain (1980)
Specimen size: 14 × 8.5 × 6.5 cm = 5.51” × 3.35” × 2.56”

TA56G1: Twinned Calcite

Fine specimen of the discovery in August 2004, in Madagascar, with the typical complex twin and excellent color, bright and clarity.
Basalt Quarry, Ambariomiambana, Sambava District, Sava Region Madagascar (08/2004)
Specimen size: 4.3 × 4 × 3.5 cm = 1.69” × 1.57” × 1.38”

TB27G9: Twinned Calcite

A group of slightly flattened crystals that have a very uncommon type of twinning. They are on a matrix of little Quartz crystals. With the Calcite, some white prismatic crystals of Laumontite have also grown.
Basalt Quarry, Ambariomiambana, Sambava District, Sava Region Madagascar (08/2004)
Specimen size: 6.5 × 4.5 × 4 cm = 2.56” × 1.77” × 1.57”

TC67J3: Twinned Calcite

Group of crystals from the August 2004, find. The aggregate is very attractive and we note the clearness of the crystals, the color and luster and, especially, the existence of twins formed by the contact of two rhombohedrons.
Basalt Quarry, Ambariomiambana, Sambava District, Sava Region Madagascar (08/2004)
Specimen size: 6.7 × 4 × 3.7 cm = 2.64” × 1.57” × 1.46”

Main crystal size: 4.5 × 3 cm = 1.77” × 1.18”

TE56L0: Twinned Calcite

An interesting novelty of Tucson 2008. A nice twin of two short Calcite crystals. Prism faces are totally clear and transparent. Pinacoidal terminations are translucent. To increase its beauty the specimen has a small matrix. Excellent miniature.
Wuzhou Prefecture, Guangxi Zhuang Autonomous Region China (10/2007)
Specimen size: 2.8 × 2.7 × 2.2 cm = 1.10” × 1.06” × 0.87”

TB62AG9: Twinned Calcite with Calcite, Palygorskite and manganese oxides

A novelty at Tucson 2017. Thick lenticular Calcite crystals with very well defined faces and edges. They are translucent with parallel growths and an easily visible interpenetration twin. They have grown around acute scalenohedral crystals of a first Calcite generation that are coated by Palygorskite. The related black material are manganese oxides.
Palmarejo Mine, Palmarejo, Municipio Chinipas, Chihuahua Mexico (10/2016)
Specimen size: 18.3 × 10.7 × 10 cm = 7.20” × 4.21” × 3.94”

Main crystal size: 6.5 × 4.8 cm = 2.56” × 1.89”

RC59I8: Twinned Cassiterite

Crystal forms a cyclic, dipyramidal twin, very well defined. It has brown color and it is translucent and very bright.
Minas da Panasqueira, level 2, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro Portugal
Specimen size: 2 × 1.8 × 1.3 cm = 0.79” × 0.71” × 0.51”

TC26J3: Twinned Cassiterite

A very interesting miniature both for the size of the crystal, considerable for Panasqueira, and because it is nearly transparent and has a very evident twin.
Minas da Panasqueira, level 2, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro Portugal (±1978)
Specimen size: 2.6 × 2.6 × 2.8 cm = 1.02” × 1.02” × 1.10”

10AF45: Twinned Cerussite

Perfect V-shaped twin of two Cerussite crystals, translucent and highly lustrous, with perfectly defined faces and edges. A remote classic, from Touissit's legendary IX shaft, from which it is increasingly difficult to find good quality pieces.
Shaft IX (Puit IX), Touissit, Touissit District, Jerada Province, Oriental Region Morocco
Specimen size: 1.6 × 0.8 × 0.2 cm = 0.63” × 0.31” × 0.08”

TN56AL3: Twinned Cerussite

Floater reticulated Cerussite aggregate with multiple twinned crystals between lamellar and tabular, highly profiled, transparent, bright and more limpid and perfect than is usually the case in the Cerussites from this deposit.
Nakhlak Mine, ↓180 m., Madan-e Nakhlak, Anarak District, Nain, Isfahan Province Iran (03/2016)
Specimen size: 4.4 × 3.3 × 1.9 cm = 1.73” × 1.30” × 0.75”

TA66AL3: Twinned Cerussite

TQ96AL3: Twinned Cerussite

TP86AJ9: Twinned Cerussite

We must especially note the esthetic quality of this kind of floater Cerussite aggregates forming multiple twins of very sharp crystals that are between laminar and tabular, transparent, very bright and more neat and perfect than most of the samples from this locality.
Nakhlak Mine, ↓180 m., Madan-e Nakhlak, Anarak District, Nain, Isfahan Province Iran (03/2016)
Specimen size: 4.6 × 3.3 × 3.2 cm = 1.81” × 1.30” × 1.26”

12722 results found.

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