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NB14AL4: Chalcocite with Pyrite
Very sharp Chalcocite crystals that form flattened twins with well defined faces and edges, bright, and on matrix. With Pyrite coatings. The specimen has been analyzed and we will send a copy of the analysis to the buyer.
Las Cruces Mine, Gerena-Guillena-Salteras, Comarca Sierra Norte, Seville, Andalusia  Spain
Specimen size: 6.1 × 4.6 × 3.1 cm = 2.40” × 1.81” × 1.22”
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TC2110NCY: Chalcocite with Pyrite
Very sharp lamellar Chalcocite crystals with a hexagonal outline and on Pyrite matrix. The specimen came from the last finds before the definitive closure of the open pit operations at this mine. Them were analyzed and we will send a copy of the analysis to the buyer.
Las Cruces Mine, fase 6, levels 130-135, ↓175 m., Gerena-Guillena-Salteras, Comarca Sierra Norte, Seville, Andalusia  Spain (01/2020)
Specimen size: 10.5 × 9.1 × 4.8 cm = 4.13” × 3.58” × 1.89”

Main crystal size: 0.3 × 0.2 cm = 0.12” × 0.08”
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NF56AL4: Chalcocite with Pyrite
Very sharp Chalcocite crystals that form hexagonal cyclic twins with well defined faces and edges, flattened, bright, on matrix with crystalline Pyrite inclusions. The specimen has been analyzed and we will send a copy of the analysis to the buyer.
Las Cruces Mine, Gerena-Guillena-Salteras, Comarca Sierra Norte, Seville, Andalusia  Spain
Specimen size: 3.6 × 3.2 × 1.1 cm = 1.42” × 1.26” × 0.43”
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ND86AL5: Chalcocite with Pyrite
Growth on matrix of highly profiled Chalcocite crystals that form flattened twins with a hexagonal outline, with very well defined faces and edges, bright, bluish in color, on matrix, with coatings of Pyrite microcrystals. These specimens were analyzed and we will send a copy of the analysis to the buyer.
Las Cruces Mine, Gerena-Guillena-Salteras, Comarca Sierra Norte, Seville, Andalusia  Spain
Specimen size: 6 × 4 × 2.7 cm = 2.36” × 1.57” × 1.06”

Main crystal size: 0.6 × 0.3 cm = 0.24” × 0.12”
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TC2220NKF: Chalcocite with Pyrite
Very sharp lamellar Chalcocite crystals with a hexagonal outline and on Pyrite matrix. The specimen came from the last finds before the definitive closure of the open pit operations at this mine. Them were analyzed and we will send a copy of the analysis to the buyer.
Las Cruces Mine, fase 6, levels 130-135, ↓175 m., Gerena-Guillena-Salteras, Comarca Sierra Norte, Seville, Andalusia  Spain (09-11/2019)
Specimen size: 3.5 × 2.3 × 2 cm = 1.38” × 0.91” × 0.79”
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NMB27AP0: Chalcocite with Pyrite
Druse of very sharp Chalcocite crystals that form hexagonal cyclic twins with very well defined faces and edges, flattened, lustrous, and on an unaltered Pyrite matrix. This specimen has been analyzed and we will send a copy of the analysis to the buyer.
Las Cruces Mine, fase 6, levels 130-135, ↓175 m., Gerena-Guillena-Salteras, Comarca Sierra Norte, Seville, Andalusia  Spain (01/2020)
Specimen size: 9.8 × 9.5 × 8.3 cm = 3.86” × 3.74” × 3.27”

Main crystal size: 0.5 × 0.5 cm = 0.20” × 0.20”
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NC37AL5: Chalcocite with Pyrite
Very sharp Chalcocite crystals that form flattened twins with a hexagonal outline, with very well defined faces and edges, good luster, on matrix, with Pyrite coatings. These specimens were analyzed and we will send a copy of the analysis to the buyer.
Las Cruces Mine, Gerena-Guillena-Salteras, Comarca Sierra Norte, Seville, Andalusia  Spain
Specimen size: 2.4 × 2.4 × 2.3 cm = 0.94” × 0.94” × 0.91”
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NB97AL5: Chalcocite with Pyrite
Growth on matrix of highly profiled Chalcocite crystals that form flattened twins with a hexagonal outline, with very well defined faces and edges, with good luster, on matrix, with iridescent Pyrite crystal coatings of mauve and dominant blue tones. These specimens were analyzed and we will send a copy of the analysis to the buyer.
Las Cruces Mine, Gerena-Guillena-Salteras, Comarca Sierra Norte, Seville, Andalusia  Spain
Specimen size: 4.9 × 2.7 × 3.4 cm = 1.93” × 1.06” × 1.34”

Main crystal size: 0.7 × 0.6 cm = 0.28” × 0.24”
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NM48AL5: Chalcocite with Pyrite
Growth on matrix of highly profiled Chalcocite crystals that form flattened twins with a hexagonal outline, with very well defined faces and edges, bright, bluish in color, on matrix, with iridescent Pyrite crystal coatings. These pieces were analyzed and we will send a copy of the analysis to the buyer.
Las Cruces Mine, Gerena-Guillena-Salteras, Comarca Sierra Norte, Seville, Andalusia  Spain
Specimen size: 3.4 × 2.4 × 2.1 cm = 1.34” × 0.94” × 0.83”
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TMA1AP8: Chalcocite with Pyrite
Very sharp crystals of Chalcocite, of very good size, twinned, with faces and edges very well defined, flattened, very lustrous, and on a Pyrite matrix. The specimen has been analyzed and we will send a copy of the analysis to the buyer.
Las Cruces Mine, fase 6, levels 130-135, ↓175 m., Gerena-Guillena-Salteras, Comarca Sierra Norte, Seville, Andalusia  Spain (01/2020)
Specimen size: 8.7 × 5 × 4.2 cm = 3.43” × 1.97” × 1.65”

Main crystal size: 1.5 × 1.5 cm = 0.59” × 0.59”
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JXR92AP8: Chalcocite with Pyrite
Very sharp crystals of Chalcocite, of very good size, twinned, with faces and edges very well defined, flattened, extraordinarily lustrous and on a Pyrite matrix. The specimen has been analyzed and we will send a copy of the analysis to the buyer. It comes from the collection of Andrés Jiménez Shelly.
Las Cruces Mine, fase 6, levels 130-135, ↓175 m., Gerena-Guillena-Salteras, Comarca Sierra Norte, Seville, Andalusia  Spain (01/2020)
Specimen size: 8.2 × 4.1 × 4.7 cm = 3.23” × 1.61” × 1.85”
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NAF72AO0: Chalcocite with Pyrite
Very sharp Chalcocite crystals that form very well defined twins, lustrous, with a metallic grey tone. On matrix with coatings of Pyrite microcrystals which are very lustrous and with vivid iridescent metallic tones. The specimen, very unusual, comes from the last find before the final closure of this open pit mine. Specimens from this find have been analyzed and we will send a copy of the analysis to the buyer.
The specimen has been photographed and published in the magazine ‘Paragénesis’, number 01/2022, page 74
Las Cruces Mine, Gerena-Guillena-Salteras, Comarca Sierra Norte, Seville, Andalusia  Spain (01/2020)
Specimen size: 12.5 × 10.5 × 8.7 cm = 4.92” × 4.13” × 3.43”

Main crystal size: 0.6 × 0.5 cm = 0.24” × 0.20”
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NK12AL4: Chalcocite with Sb-rich Tennantite-(Fe)
Very sharp Chalcocite crystals that form flattened twins with well defined faces and edges, with good luster, on matrix, with tetrahedral crystals of Tennantite-(Fe) rich in antimony. The specimen has been analyzed and we will send a copy of the analysis to the buyer.
Las Cruces Mine, Gerena-Guillena-Salteras, Comarca Sierra Norte, Seville, Andalusia  Spain
Specimen size: 2.9 × 2 × 1 cm = 1.14” × 0.79” × 0.39”
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NE11AL4: Chalcocite with Sb-rich Tennantite-(Fe) and Pyrite
Very sharp Chalcocite crystals that form hexagonal cyclic twins with well defined faces and edges, flattened, lustrous, on matrix, with tetrahedral crystals of antimony-rich Tennantite-(Fe) and coatings of botryoidal pyrite. The specimen has been analyzed and we will send a copy of the analysis to the buyer.
Las Cruces Mine, Gerena-Guillena-Salteras, Comarca Sierra Norte, Seville, Andalusia  Spain
Specimen size: 6.5 × 4.4 × 2.7 cm = 2.56” × 1.73” × 1.06”

Main crystal size: 0.1 × 0.1 cm = 0.04” × 0.04”
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NG66AL4: Chalcocite with Sb-rich Tennantite-(Fe) and Pyrite
Very sharp Chalcocite crystals that form hexagonal cyclic twins with well defined faces and edges, flattened, lustrous, on matrix, with antimony-rich Tennantite-(Fe) and coatings of iridescent botryoidal Pyrite dominated by purple tones. The specimen has been analyzed and we will send a copy of the analysis to the buyer.
Las Cruces Mine, Gerena-Guillena-Salteras, Comarca Sierra Norte, Seville, Andalusia  Spain
Specimen size: 4.4 × 4 × 3.3 cm = 1.73” × 1.57” × 1.30”
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NH47AL5: Chalcocite with Sb-rich Tennantite-(Fe) and Pyrite
Growth on matrix of highly profiled Chalcocite crystals that form flattened twins with a hexagonal outline, with very well defined faces and edges, lustrous, on matrix, with antimony-rich Tennantite- (Fe) and Pyrite coatings. These pieces were analyzed and we will send a copy of the analysis to the buyer.
Las Cruces Mine, Gerena-Guillena-Salteras, Comarca Sierra Norte, Seville, Andalusia  Spain
Specimen size: 3.9 × 3.4 × 1.5 cm = 1.54” × 1.34” × 0.59”

Main crystal size: 0.7 × 0.4 cm = 0.28” × 0.16”
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7NA25: Chalcocite, Pyrite
Very sharp Chalcocite crystals that form flattened twins with very well defined faces and edges, bright and on matrix, with very vivid metallic blue iridescent Pyrite coatings. The sample has been analyzed and we will send a copy of the analysis to the buyer.
Las Cruces Mine, Gerena-Guillena-Salteras, Comarca Sierra Norte, Seville, Andalusia  Spain (01/2020)
Specimen size: 3.2 × 2.2 × 1.6 cm = 1.26” × 0.87” × 0.63”
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7NJ30: Chalcocite, Pyrite
Sharp Chalcocite crystals that form flattened twins with very well defined faces and edges, bright and on matrix, with very vivid metallic blue iridescent Pyrite coatings. The sample has been analyzed and we will send a copy of the analysis to the buyer.
Las Cruces Mine, Gerena-Guillena-Salteras, Comarca Sierra Norte, Seville, Andalusia  Spain
Specimen size: 2.2 × 2.2 × 1.1 cm = 0.87” × 0.87” × 0.43”
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7NG40: Chalcocite, Pyrite
Very sharp Chalcocite crystals that form flattened twins with very well defined faces and edges, bright and on matrix, with very vivid metallic blue iridescent Pyrite coatings. The sample has been analyzed and we will send a copy of the analysis to the buyer.
Las Cruces Mine, Gerena-Guillena-Salteras, Comarca Sierra Norte, Seville, Andalusia  Spain (01/2020)
Specimen size: 1.7 × 1.5 × 1.0 cm = 0.67” × 0.59” × 0.39”
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7ND40: Chalcocite, Pyrite
Very sharp Chalcocite crystals that form flattened twins with very well defined faces and edges, bright and on matrix, with very vivid metallic blue iridescent Pyrite coatings. The sample has been analyzed and we will send a copy of the analysis to the buyer.
Las Cruces Mine, Gerena-Guillena-Salteras, Comarca Sierra Norte, Seville, Andalusia  Spain
Specimen size: 2.5 × 2.2 × 1.1 cm = 0.98” × 0.87” × 0.43”
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7NR45: Chalcocite, Pyrite
Very sharp Chalcocite crystals that form flattened twins with very well defined faces and edges, bright and on matrix, with very vivid metallic blue iridescent Pyrite coatings. The sample has been analyzed and we will send a copy of the analysis to the buyer.
Las Cruces Mine, Gerena-Guillena-Salteras, Comarca Sierra Norte, Seville, Andalusia  Spain
Specimen size: 3.7 × 2.7 × 2.5 cm = 1.46” × 1.06” × 0.98”
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7NT60: Chalcocite, Pyrite
Very sharp Chalcocite crystals that form flattened twins with very well defined faces and edges, bright and on matrix, with very vivid metallic blue iridescent Pyrite coatings. The sample has been analyzed and we will send a copy of the analysis to the buyer.
Las Cruces Mine, Gerena-Guillena-Salteras, Comarca Sierra Norte, Seville, Andalusia  Spain (01/2020)
Specimen size: 3.8 × 2.6 × 2.3 cm = 1.50” × 1.02” × 0.91”

Main crystal size: 0.3 × 0.4 cm = 0.12” × 0.16”
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11TT12: Chalcocite, Quartz
Flattened crystals, very sharp, partially doubly terminated and twinned, on matrix, with a strong metallic luster and bluish reflections, associated with small whitish Quartz crystals. Coming from the Bristol Copper Mine, in Connecticut, USA, these chalcocites are classics, and this particular piece is a real oldie, from the begin of the XX century
Bristol Copper Mine, Bristol, Hartford County, Connecticut  USA (±1930)
Specimen size: 5.5 × 4.7 × 3.4 cm = 2.17” × 1.85” × 1.34”
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16NNR60: Chalcocite, Sb-bearing Tennantite-(Fe), Pyrite
Growth on matrix of very sharp crystals of Chalcocite that form flattened twins of hexagonal outline, with very well defined faces and edges, lustrous, on matrix, with antimony-rich Tennantite-(Fe) and Pyrite coatings. These specimens have been analyzed and we will send a copy of the analysis to the buyer. From an open pit mine that has already ceased operations.
Las Cruces Mine, fase 6, levels 130-135, ↓175 m., Gerena-Guillena-Salteras, Comarca Sierra Norte, Seville, Andalusia  Spain (09-11/2019)
Specimen size: 6.2 × 6.0 × 4.8 cm = 2.44” × 2.36” × 1.89”

Main crystal size: 0.6 × 0.3 cm = 0.24” × 0.12”
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MT27AM9: Chalcophyllite
Groups of Chalcophyllite crystals on matrix, very sharp, with a sharp hexagonal outline and a very uniform greenish blue color. This specimen, from a classic American locality for the species, is from the Robert J. Noble collection and will be sent to the buyer in its original Perky box from that collection, which also contains the label.
Majuba Hill Mine, Antelope District, Pershing County, Nevada  USA
Specimen size: 2.8 × 1.6 × 1.8 cm = 1.10” × 0.63” × 0.71”

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The Silvane Collection
The Silvane
Collection
The Pedro Goy Collection
The Pedro Goy
Collection
The Desmond Sacco Collection
The Desmond Sacco
Collection
Best Specimens
Best Specimens
The Folch Collection
The Folch
Collection
Home Page Minerals
Home Page
Minerals