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DB93AD9: Galena with Sphalerite, Calcite, Tetrahedrite (group) and Chalcopyrite

Cubic Galena crystals with small octahedral faces. They are very well defined and extraordinarily bright, with polycrystalline and skeletal growths. They are with Sphalerite (marmatite variety), Tetrahedrite, Chalcopyrite and are coated by white growths of Calcite microcrystals. An excellent sample from the prestigious collection of Desmond Sacco.
Dalnegorsk, Dalnegorsk Urban District, Primorsky Krai Russia
Specimen size: 11.7 × 9.7 × 8.3 cm = 4.61” × 3.82” × 3.27”

EA87AM3: Galena with Sphalerite, Quartz and Fluorite

Intergrowth of twinned Sphalerite crystals with skeletal Galena crystals. On matrix, with small white Quartz crystals and polycrystalline Fluorite growths. Very old and unusual piece.
Los Remedios Mine, Taxco de Alarcón, Municipio Taxco, Guerrero Mexico
Specimen size: 13.8 × 8.8 × 3.2 cm = 5.43” × 3.46” × 1.26”

Main crystal size: 2 × 1.4 cm = 0.79” × 0.55”

JC99W6: Galena with Sphalerite, Quartz and Pyrite

Group of extraordinarily flattened crystals of Galena with parallel growths showing the Spinel law twin, which is very evident on their edges. On a Sphalerite matrix, with Quartz and Pyrite.
Huancavelica Department Peru (±1996)
Specimen size: 8.7 × 6.9 × 4.8 cm = 3.43” × 2.72” × 1.89”

19CMP14: Galena, Baryte, Calcite

Group formed by three interpenetrating Galena crystals, one of them clearly dominant, with perfectly defined faces and edges and with polycrystalline growths on some of the crystal faces. Characteristic lead-grey color and dull luster, accompanied by whitish tabular Baryte crystals on the back of the piece and small scattered remnants of Calcite. Comes from a mining district which exploited Pb and Zn minerals for a century. This specimen comes from the former collection (duplicates) of Carles Curto (number 1982.43), whose label we will send to the buyer.
Picher Field, Tri-State District, Ottawa County, Oklahoma USA
Specimen size: 5.5 × 4.0 × 3.8 cm = 2.17” × 1.57” × 1.50”

Main crystal size: 3.7 × 3.1 × 3.0 cm = 1.46” × 1.22” × 1.18”

21TQX36: Galena, Baryte, Cerussite, Plumbogummite, Quartz, Wulfenite

A novelty at the Sainte Marie 2021 Virtual show. Group of equant Galena crystals coated with white Cerussite microcrystals. They are also partially covered by Plumbogummite with a slightly bluish color and Quartz microcrystals, and on top of this small bipyramidal transparent yellow Wulfenite crystals. Above this ensemble are salmon-colored Quartz crystals and lamellar Baryte crystals. The specimen comes from a 2021 find in the Georges vein in the Sidi Ayad area. It has been analyzed and we will send a copy of the analyses of the various species to the buyer.
Georges vein, Sidi Ayad (Sidi Ayed), Boulemane Province, Fès-Meknès Region Morocco (03/2021)
Specimen size: 8.2 × 5.5 × 5.0 cm = 3.23” × 2.17” × 1.97”

21TTX13: Galena, Cerussite, Plumbogummite, Quartz, Wulfenite

A novelty at the Sainte Marie 2021 Virtual show. Group of equant Galena crystals coated with white Cerussite microcrystals. They are also partially covered by Plumbogummite with a slightly bluish color and Quartz microcrystals, and on top of this small bipyramidal Wulfenite crystals, transparent and yellow. Above this there are Quartz crystals. The specimen comes from a 2021 find in the Georges vein in the Sidi Ayad area. It has been analyzed and we will send a copy of the analyses of the various species to the buyer.
Georges vein, Sidi Ayad (Sidi Ayed), Boulemane Province, Fès-Meknès Region Morocco (03/2021)
Specimen size: 5.5 × 3.6 × 3.2 cm = 2.17” × 1.42” × 1.26”

Main crystal size: 3.6 × 2.6 cm = 1.42” × 1.02”

19TVR14: Galena, Quartz, Rhodochrosite, Calcite

Isolated crystals of Galena with pentadodecahedral forms modified by cube faces, and showing dissolution and corrosion figures on some faces and polycrystalline growths on others, on a matrix covered by slightly pink carbonates formed by intergrowths of Rhodochrosite and Calcite. Finally, the combination is adorned with a good number of water-clear Quartz crystals, some of them aerial. The Trepča mining complex is one of the largest polymetallic deposits in the world and for many years produced exceptional pieces, and still now, of Sphalerite as well as various combinations of sulphides and carbonates, as displayed in this specimen from the former collections of Ferat Voca.
Stan Trg (Stan Terg, Stari Trg) Mine, Trepča Complex, Trepča Valley, Kosovska Mitrovica, Kosovska Mitrovica District Kosovo (2000-2021)
Specimen size: 9.8 × 4.5 × 2.9 cm = 3.86” × 1.77” × 1.14”

23TJX14: Galena, Sphalerite, Calcite

Group of cubo-octahedral Galena crystals with metallic luster, one of them clearly dominant and implanted in a matrix formed by Sphalerite and small aggregates of Calcite. The specimen comes from the La Unión-Cartagena mining district, a classic for mining in Murcia. The specimen has been sawn on the back to remove excess matrix.
La Unión, Comarca Campo de Cartagena, Region of Murcia (Murcia) Spain
Specimen size: 4.4 × 3.5 × 2.7 cm = 1.73” × 1.38” × 1.06”

Main crystal size: 1.7 × 1.5 cm = 0.67” × 0.59”

TR89AE8: Galkhaite with Galena

Galkhaite is a very rare sulphosalt. The crystals on the sample, with a good size for the species, are cubic, with small octahedron faces, quite well defined, bright and on matrix, with Galena and Pyrite.
Twin Creeks Mine, Potosi District, Osgood Mountains, Humboldt County, Nevada USA (1999)
Specimen size: 4.6 × 2.9 × 2.7 cm = 1.81” × 1.14” × 1.06”

SM50DZD: Garnet (Group) with Quartz (varity smoky), Microcline and Albite

Trapezohedral Garnet crystals implanted on a sharp Manebach-law twin crystal of Microcline, partially covered by small Quartz crystals (smoky variety) and polycrystalline growths of Albite. The specimen comes from the Lluis Daunis collection, a collection that was a reference for Catalan region collectors.
Les Mallorquines, Sils, Comarca La Selva, Gerona / Girona, Catalonia / Catalunya Spain
Specimen size: 3.7 × 3 × 1.6 cm = 1.46” × 1.18” × 0.63”

Main crystal size: 0.5 × 0.4 cm = 0.20” × 0.16”

DY13AH7: Garnet with Quartz (variety smoky) and Microcline

Trapezohedral garnet crystals that are transparent, bright, with a very intense color and on a matrix of Microcline crystals with smoky Quartz crystals.
The Daunis collection was, in the 70’s and the 80’s, a reference for local prospectors of the Barcelona area. The sample is with the original manuscript label that we will send to the buyer.
Natural park Del Montnegre i el Corredor, Litoral Range granitic batolith, Comarca Maresme, Barcelona, Catalonia / Catalunya Spain
Specimen size: 4.6 × 3.5 × 2.3 cm = 1.81” × 1.38” × 0.91”

DY46AH6: Garnet with Quartz and Albite

Garnet (group) crystals with the forms of the dodecahedron and the trapezohedron, transparent, bright, with a very intense color at the base of a large transparent Quartz crystal and a group of Albite crystals. Very unusual for the locality.
The Daunis collection was, in the 70’s and the 80’s, a reference for the local prospectors of the Barcelona area.
Miraflores de la Sierra, Comarca Cuenca Alta del Manzanares, Community of Madrid Spain
Specimen size: 5.8 × 3.1 × 3.2 cm = 2.28” × 1.22” × 1.26”

Main crystal size: 0.4 × 0.3 cm = 0.16” × 0.12”

TC97Q6: Gartrellite with Bayldonite and Azurite

Vivid yellow concertina-shaped growths of the rare species Gartrellite, with Azurite crystals and a group of Bayldonite with very well defined faces and edges which is very rare. We’ll send a copy of the analysis of the Gartrellite and the Bayldonite.
Tsumeb Mine, Tsumeb, Otjikoto Region Namibia
Specimen size: 3.4 × 2.1 × 2.1 cm = 1.34” × 0.83” × 0.83”

FC56: Gartrellite with Mimetite

A major specimen. Gartrellite is a mineral species that was recently discovered (1990) and its presentation up until now is not that great under common esthetic standards. Usually it is presented as dull crusts of fine-grained coatings, cryptocrystalline or as incrustations, so basically not beautiful. One specimen from Oliete's collection was labeled as Arsentsumebite, but I was suspicious that it wasn't. I ordered a double X-ray and difractometry test and the result was Gartrellite: bingo! This particular specimen is probably one of the world's nicest Gartrellite and it is shown for first time to the mineral world in this update. Gemmy minor Mimetites are also present, completing a world class specimen.
Tsumeb Mine, Tsumeb, Otjikoto Region Namibia
Specimen size: 6 × 4 × 3 cm = 2.36” × 1.57” × 1.18”

TG36Q5: Gaudefroyite

Group of doubly terminated crystals, perfectly defined. They are formed by the prism and the dipyramid, with an excellent luster. Crystal size is notable for the species.
N'Chwaning II Mine, N'Chwaning mining area, Kuruman, Kalahari manganese field (KMF), Northern Cape Province South Africa
Specimen size: 1.8 × 1.3 × 0.9 cm = 0.71” × 0.51” × 0.35”

TT68Q3: Gaudefroyite with Andradite and Baryte

Black bright thin prismatic crystals of Gaudefroyite with very well defined faces and edges and excellent terminations. They are with a sharp white Baryte crystal and are on a matrix coated by small crystals of deep colored Andradite.
N'Chwaning II Mine, N'Chwaning mining area, Kuruman, Kalahari manganese field (KMF), Northern Cape Province South Africa (1987)
Specimen size: 8.7 × 6.2 × 3.4 cm = 3.43” × 2.44” × 1.34”

Main crystal size: 0.7 × 0.2 cm = 0.28” × 0.08”

MF86Y9: Gaudefroyite with Baryte

Irregular aggregate of very sharp Gaudefroyite crystals that are very aerial, bright and are with small white Baryte crystals.
This specimen's photo has been reviewed and published in the magazine ‘Mineralogical Record’ on page 39 in the volume 48, number 1 (January-February 2017)
N'Chwaning II Mine, N'Chwaning mining area, Kuruman, Kalahari manganese field (KMF), Northern Cape Province South Africa
Specimen size: 4.2 × 2.6 × 1.8 cm = 1.65” × 1.02” × 0.71”

CM14AM7: Gaylussite

Doubly terminated, complete floater crystal of Gaylussite, transparent, lustrous, and rich in inclusions. An African classic that comes from the Carles Curto collection, whose label and computer catalogue entry we will send to the buyer.
Amboseli Lake, Kajiado County, Rift Valley Province Kenya (±1977)
Specimen size: 2.8 × 1.4 × 1.1 cm = 1.10” × 0.55” × 0.43”

TF92AA0: Genthelvite

Parallel aggregates of very Sharp tetrahedral crystals with a clear salmon color and zonal growth. The analysis indicates that both the external zone and the interior are Genthelvite. We’ll send a copy of both analyses to the buyer.
Huanggang Mines, Hexigten Banner (Kèshíkèténg Qí), Chifeng (Ulanhad), Inner Mongolia Autonomous Region China (2013)
Specimen size: 4.4 × 3.4 × 3.2 cm = 1.73” × 1.34” × 1.26”

MV70T6: Genthelvite with Andradite

A novelty at Munich 2011. Group of sharp tetrahedral crystals of Genthelvite, one of them clearly dominant, with a dark brown color, translucent edges, in matrix, and related dodecahedral crystals of Andradite. Excellent quality for the species. We’ll send a copy of the analysis to the buyer.
The specimen has been reviewed, photographed and published in the magazine ‘Rivista Mineralogica Italiana’ on page 259 in number 2011/4
Huanggang Mines, Hexigten Banner (Kèshíkèténg Qí), Chifeng (Ulanhad), Inner Mongolia Autonomous Region China (2011)
Specimen size: 4.1 × 3.7 × 2.3 cm = 1.61” × 1.46” × 0.91”

Main crystal size: 1.3 × 1.3 cm = 0.51” × 0.51”

EN99Y6: Genthelvite with Calcite and Chlorite

Very aerial group, on a Calcite matrix, of very sharp tetrahedral crystals with a clear salmon color and zonal growth. The analysis indicates that both the external zone and the inner crystal are Genthelvite. We’ll send a copy of both analyses to the buyer.
Huanggang Mines, Hexigten Banner (Kèshíkèténg Qí), Chifeng (Ulanhad), Inner Mongolia Autonomous Region China (±2012)
Specimen size: 4.1 × 3.6 × 3.8 cm = 1.61” × 1.42” × 1.50”

EG36Z0: Genthelvite with Magnetite and Arsenopyrite

Aggregates of very sharp tetrahedral Genthelvite crystals on matrix, with Magnetite and Arsenopyrite crystals. The Genthelvite crystals clearly show zonal growth, so we did two analyses (inner and external), both resulting in Genthelvite. We will send a copy of both analyses to the buyer.
Huanggang Mines, Hexigten Banner (Kèshíkèténg Qí), Chifeng (Ulanhad), Inner Mongolia Autonomous Region China (2012)
Specimen size: 6.4 × 4.7 × 6.3 cm = 2.52” × 1.85” × 2.48”

Main crystal size: 1.3 × 1.2 cm = 0.51” × 0.47”

MJ66Y3: Genthelvite with Magnetite and Quartz

Very aerial group of Genthelvite crystals with very well defined faces and edges, a warm cream color and on a matrix of dodecahedral Magnetite crystals with small Quartz crystals. An analysis of both the core and the surface indicates it is only Genthelvite, without Helvine. We’ll send a copy of the analysis to the buyer.
Huanggang Mines, Hexigten Banner (Kèshíkèténg Qí), Chifeng (Ulanhad), Inner Mongolia Autonomous Region China (2012)
Specimen size: 7.7 × 5.7 × 5 cm = 3.03” × 2.24” × 1.97”

EQ26AA8: Genthelvite with Magnetite, Quartz, Fluorite, Arsenopyrite, Calcite-Dolomite

Aggregate of very sharp tetrahedral Genthelvite crystals on a Magnetite matrix, with white rhombohedral Calcite-Dolomite crystals, Arsenopyrite, Quartz and Fluorite. As the close-up view photo shows, the Fluorite is especially clear. The analyses at different depths of the crystals reveal they are uniformly Genthelvite, without other species in zones. We will send a copy of the analyses to the buyer.
Huanggang Mines, Hexigten Banner (Kèshíkèténg Qí), Chifeng (Ulanhad), Inner Mongolia Autonomous Region China (2014)
Specimen size: 9.8 × 6.5 × 4.2 cm = 3.86” × 2.56” × 1.65”

Main crystal size: 2.6 × 2.3 cm = 1.02” × 0.91”

MP56AE1: Genthelvite with Quartz and Calcite

Very aerial aggregate of very sharp tetrahedral Genthelvite crystals with a salmon color and partially coated by Calcite and microcrystalline Quartz. The analysis gives Genthelvite both on the crystal surfaces and in the interior. We’ll send a copy of the analysis to the buyer.
The specimen's photo has been reviewed and published in the magazine ‘Rocks & Minerals’ on page 63 in the volume 96, number 1, Jan/Feb 2021
Huanggang Mines, Hexigten Banner (Kèshíkèténg Qí), Chifeng (Ulanhad), Inner Mongolia Autonomous Region China (2012)
Specimen size: 4 × 3 × 3.2 cm = 1.57” × 1.18” × 1.26”

12722 results found.

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