Pre-Ste. Marie 2020 (virtual)

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Carles Curto Text: Carles Curto (formerly curator of the Geology Museum, Barcelona) & Jordi Fabre
Assistance from John S. White (former Smithsonian curator) John S. White


USA

Wulfenite with Calcite
Wulfenite with Calcite. Wulfenite with Calcite.
Wulfenite with Calcite. Wulfenite with Calcite.

Recorded under neon light
 

MX470AL4: Wulfenite crystals very rich in crystalline forms, well individualized, with a very intense and uniform color and good luster, on matrix and with small rhombohedral Calcite crystals. Excellent example of a classic American locality, from an old collection whose label we will send to the buyer.
Red Cloud Mine, Trigo Mountains, Silver District, La Paz County, Arizona  USA

Specimen size: 8.6 × 6.1 × 2.7 cm = 3.39” × 2.40” × 1.06”

Main crystal size: 1.3 × 1 cm = 0.51” × 0.39”




Order

MEXICO

Smithsonite after Calcite with Calcite
 

TZ260AL4: Smithsonite pseudomorphic growths after scalenohedral Calcite crystals. The specimen shows growth of a successive series of layers that indicate that the Calcite was partially replaced in a first phase and finally ended up being totally replaced by Smithsonite.
San Antonio Mine (San Antonio el Grande Mine), level 8, East Camp, Santa Eulalia District, Municipio Aquiles Serdán, Chihuahua  Mexico (04/2013)

Specimen size: 3.2 × 2.4 × 2.4 cm = 1.26” × 0.94” × 0.94”

Main crystal size: 2.4 × 1.2 cm = 0.94” × 0.47”




Smithsonite after Calcite with Calcite. Front
Front
Smithsonite after Calcite with Calcite. Rear
Rear
Order
Smithsonite after Calcite with Calcite
Smithsonite after Calcite with Calcite. Front
Front
Smithsonite after Calcite with Calcite. Rear
Rear
 

TG66AL4: Smithsonite as pseudomorphic growths after scalenohedral Calcite crystals. The specimen shows the growth of a successive series of layers that indicate that the Calcite was partially replaced in a first phase, then later ended up being totally replaced by Smithsonite, and with Calcite crystallizing again in a final phase, in the form of small white rhombohedral crystals.
San Antonio Mine (San Antonio el Grande Mine), level 8, East Camp, Santa Eulalia District, Municipio Aquiles Serdán, Chihuahua  Mexico (04/2013)

Specimen size: 4.4 × 3.8 × 3.4 cm = 1.73” × 1.50” × 1.34”

Main crystal size: 4.1 × 2.4 cm = 1.61” × 0.94”




Order
Azurite

Recorded under neon light
 

TN68AL4: This floater specimen has rosette growths of Azurite crystals with very well defined crystal forms, marked polycrystalline growths and a very intense and vivid color. The high-quality specimen is among the best known for this classic world Azurite locality, and was found by Jimmy Vacek in 1986.
Concepción del Oro, Municipio Concepción del Oro, Zacatecas  Mexico (1986)

Specimen size: 6.1 × 4.7 × 3.9 cm = 2.40” × 1.85” × 1.54”




Azurite. Front
Front
Azurite. Rear
Rear
Azurite.
Order
Brochantite with Dickite
Brochantite with Dickite. Front
Front
Brochantite with Dickite. Side
Side

Recorded under neon light
 

TR51AL4: Two complete Brochantite crystals, isolated and extraordinarily well defined, with sharp crystal forms, chisel-like terminations, implanted on matrix with white growths of Dickite, an aluminum silicate. Both the excellent definition and size of the crystals as well as the color, the luster and, in general, their extraordinary quality, place this type of specimen among the best in the world.
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora  Mexico (07-08/2014)

Specimen size: 4.6 × 4.2 × 3.2 cm = 1.81” × 1.65” × 1.26”

Main crystal size: 2 × 0.9 cm = 0.79” × 0.35”




Order
Malachite after Azurite with Malachite

Recorded under neon light
 

TC37AL4: A novelty at Tucson 2020 for its appearance and color. Group of very sharp Azurite crystals, partially pseudomorphs after Azurite, with very vivid translucent reflections on the edges and partially covered with a second generation of Malachite with a fibrous appearance and a color very different from the usual one.
Milpillas Mine, level 1100, Cuitaca, Municipio Santa Cruz, Sonora  Mexico (01/2020)

Specimen size: 6.6 × 5 × 2.6 cm = 2.60” × 1.97” × 1.02”

Main crystal size: 2.7 × 2.5 cm = 1.06” × 0.98”




Malachite after Azurite with Malachite. Front
Front
Malachite after Azurite with Malachite. Side
Side
Malachite after Azurite with Malachite.
Order

CANADA

Quartz (japan law twin)
Quartz (japan law twin). Quartz (japan law twin).
 

EB76AL4: From a find by local field collectors between 2008 and 2011 in a mineralogically previously little-known locality. Group of crystals, one of them clearly dominant, flattened, with the japan-law twin unusually closed, which gives it a unitary crystal appearance, with sharp crystal forms, transparent, with good luster, colorless and with reddish tones in some areas due to the presence of oxide inclusions.
Harrison Lake, Chilliwack, Regional District Fraser Valley, British Columbia  Canada (2008-2011)

Specimen size: 3.9 × 3.5 × 3.1 cm = 1.54” × 1.38” × 1.22”

Main crystal size: 1.1 × 1.1 cm = 0.43” × 0.43”




Order

SPAIN

Chalcocite with Pyrite
 

NR11AL4: Very sharp Chalcocite crystals that form hexagonal cyclic twins with well defined faces and edges, flattened, shiny, on matrix. 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: 4.1 × 2.2 × 1.3 cm = 1.61” × 0.87” × 0.51”

Main crystal size: 0.3 × 0.2 cm = 0.12” × 0.08”




Chalcocite with Pyrite. Chalcocite with Pyrite.
Order
Chalcocite with Sb-rich Tennantite-(Fe) and Pyrite
Chalcocite with Sb-rich Tennantite-(Fe) and Pyrite. Chalcocite with Sb-rich Tennantite-(Fe) and Pyrite.
 

NE11AL4: 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”




Order
Chalcocite with Pyrite
 

NV13AL4: Very sharp Chalcocite crystals that form flattened twins with well defined faces and edges, brilliant, on matrix, with very vivid metallic blue iridescent 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: 2.4 × 1.5 × 0.8 cm = 0.94” × 0.59” × 0.31”

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




Chalcocite with Pyrite. Chalcocite with Pyrite.
Order
Chalcocite with Pyrite
Chalcocite with Pyrite. Chalcocite with Pyrite.
 

NJ13AL4: Very sharp Chalcocite crystals that form hexagonal cyclic twins with well defined faces and edges, flattened, shiny, on matrix, with very vivid metallic blue iridescent 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: 4.9 × 3.5 × 0.7 cm = 1.93” × 1.38” × 0.28”

Main crystal size: 0.1 × 0.1 cm = 0.04” × 0.04”




Order
Chalcocite with Calcite
 

NF13AL4: Very sharp Chalcocite crystals that form flattened twins with well defined faces and edges, brilliant, on matrix, with coatings of Calcite crystals. 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 × 3.9 × 2.4 cm = 1.73” × 1.54” × 0.94”

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




Chalcocite with Calcite. Chalcocite with Calcite.
Order
Chalcocite with Pyrite
Chalcocite with Pyrite. Chalcocite with Pyrite.
 

NB14AL4: 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”

Main crystal size: 0.3 × 0.2 cm = 0.12” × 0.08”




Order
Chalcocite
 

NX16AL4: Very sharp Chalcocite crystals that form hexagonal cyclic twins with well defined faces and edges, flattened, shiny, on matrix. 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: 2.8 × 1.9 × 0.3 cm = 1.10” × 0.75” × 0.12”

Main crystal size: 0.3 × 0.2 cm = 0.12” × 0.08”




Chalcocite. Chalcocite.
Order
Chalcocite with Calcite
Chalcocite with Calcite. Chalcocite with Calcite.
 

ND26AL4: Very sharp Chalcocite crystals that form hexagonal cyclic twins with well defined faces and edges, flattened, with good luster, on a matrix covered with small white Calcite crystals. 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: 5.5 × 3.5 × 1.6 cm = 2.17” × 1.38” × 0.63”

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




Order
Chalcocite with Pyrite
 

NF56AL4: 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”

Main crystal size: 0.4 × o.2 cm = 0.16” × 0.00”




Chalcocite with Pyrite. Chalcocite with Pyrite.
Order
Chalcocite with Sb-rich Tennantite-(Fe) and Pyrite
Chalcocite with Sb-rich Tennantite-(Fe) and Pyrite. Chalcocite with Sb-rich Tennantite-(Fe) and Pyrite.
 

NG66AL4: 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”

Main crystal size: 0.6 × 0.4 cm = 0.24” × 0.16”




Order
Chalcocite on Pyrite
 

NC27AL4: Very sharp Chalcocite crystals, twinned, with well defined faces and edges, flattened, shiny, and on matrix. 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: 4.1 × 3.6 × 3.2 cm = 1.61” × 1.42” × 1.26”

Main crystal size: 0.9 × 0.4 cm = 0.35” × 0.16”




Chalcocite on Pyrite. Chalcocite on Pyrite.
Order


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