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Mineral Specimens with Chalcocite
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5.6 x 5.1 x 2.5 cm. Very sharp, lustrous, lightly iridescent chalcocite crystals with a most unusual crystal habit from the Dzhezkazgan Mine of Kazakhstan. The two large crystals are 1.0 cm and the crystals are very aesthetically lined up in a row on matrix.
5.8 x 4.3 x 3.2 cm. This is a major chalcocite, with robust, impressive crystals that look for all the world like blacker hematite than chalcocite from Bristol, because they are so thick and large. This specimen has solid rock matrix, as the host for twinned clusters to 2.5 cm. From the noted rarities and classics collection of Thomas E. Egleston (1832-1900) Professor of Mineralogy and Metallurgy, Columbia University, New York (and retains his old label). Commercial mining began in 1837 and carried on until 1953 - this mine was a hugely important US resource through the Civil War years and beyond, and collectors lament its closing.
6.4 x 4.5 x 1.6 cm. A remarkable large single crystal, complete, from a small 2001 find here by Richard Hauck. This crystal is rare for the size and thickness, as most were aggregates of smaller crystals. Ex. Ken Hollman Collection.
4.2 x 4.1 x 2.3 cm. This sharp miniature is one of the prettier Bristol chalcocites in this size range, for the sharp aesthetics of distinctly twinned, upright crystals perched on such contrasting matrix. The crystallized calcite is uncommon, and really offsets the matte black chalcocite nicely. This specimen came from the Grace Dearborn Collection to the Phil Scalisi Collection, 20 years ago or so. Commercial mining began in 1837 and carried on until 1953 - this mine was a hugely important US resource through the Civil War years and beyond, and collectors lament its closing.
11.5 x 7.6 x 6.4 cm. This extremely rich, large, cabinet specimen is one of the prettier Bristol chalcocites around, for the rich crystallization set starkly upon contrasting crystalline quartz matrix. The crystallized matrix is uncommon, and really offsets the matte black chalcocite nicely. The clusters are very 3-dimensional and dramatic, upon it. Also, small green flecks of malachite or bornite perhaps, seem to be present. Commercial mining began in 1837 and carried on until 1953 - this mine was a hugely important US resource through the Civil War years and beyond, and collectors lament its closing. Ex. George Elling and Seaman Mineralogical Museum Collections.
11.8 x 5.4 x 2.4 cm. Sharp, lustrous, dark gray chalcocite crystals richly cover the front of the cabinet-sized specimen of massive chalcopyrite/bornite ore on this fine, old-time piece from the Cole Shaft at Bisbee. Ex. Dave and Emily Stoudt Collection and according to their catalogue and label, was purchased from then Bisbee rock shop owner Chuck Youngblood in 1988.
1.8 x 1.6 x 1.6 cm. An aesthetic, old-time combination thumbnail from the historic Botallack Mine of Cornwall, England. Two disc-like, matte-gray, six-sided, bi-pyramidal chalcocite crystals are exquisitely perched on two intergrown, tabular bornite crystals. The Botallack Mine opened in 1721 and closed in 1914.
This unusual chalco features unusually slender, bladelike crystals of gunmetal gray, nicely isolated and intersecting at many angles. Barlow label sticker is on the back. 3.6 x 2.6 x 1.6 cm
SUPER-SHARP, bright golden crystals arrayed along the top of the specimen, with good separation from one another to really show each individual crystal off well. The individual crystals are to about 1 cm. Very delicate, pretty and fine in a nice sized specimen. From the collection of John Barlow, who helped finance the mining of these and was able to pick for his personal collection. 3 x 2.3 x 2 cm
9.8 x 5.7 x 4.9 cm. Chalcocite from the Flambeau mine set a modern standard for the species not matched since the mine closed (around 2000) and not seen since the old finds of the 1800s in Bristol (CT) and in Cornwall (England). This small mine of high grade ore is now reclaimed. It was worked professionally for specimens by dealers Casey and Jane Jones in the early to mid-1990s , though, under contract with the ownership. They recovered a number of specimens, among them this stellar piece from the so-called Christmas Pocket. They sold the specimen to well-known dealer and collector Scott Williams, sadly among the last things he acquired in his long life of collecting. His label is included here. The piece is a dizzying solid cluster of complexly intergrown crystals, complete all around, showing the iridescent coloration that made this mine unique. This piece is particularly rich in the blues. Weighs 398 grams, and complete-all-around. Ex. Scott Williams Collection.
A larger specimen and quite fine, showing a beautiful platy “stacked” appearance on the surface of the crystals, which are up to 2.8 cm in size. MORE GOLDEN and purple iridescence in person! Ex. Barlow Collection. 6.5 x 4.2 x 3.5 cm
5.0 x 2.6 x 1.6 cm. Sharp, lightly iridescent, golden-bronze and magenta chalcocite crystals form an excellent specimen from the mid-1990s finds at the Flambeau Mine of Wisconsin. The large crystal near to top 1.3 cm and the two intergrown columns of chalcocite crystals have a nice sculptural aspect to them. Highly representative material from this. The exact mine location is the Lucky Friday Pocket.
A finely-formed 2-cm crystal is free-standing, attached only at the bottom, on a “base” of crystallized chalcocite. Nice purple metallic sheen. Ex. Barlow Collection. 3.2 x 3.2 x 2.2 cm
Depending on which angle you look at it from, this hourglass-shaped cluster of 2 sharp and vertically stacked crystals shifts from bright gold to shimmering purple, and back again! THIS IS A REALLY NEAT PIECE...i just don''t know how else to say that! 3.1 x 2 x 0.9 cm
3.3 x 2.2 x 1.6 cm. This fine thumbnail specimen features a single, extremely well-formed, robust crystal to almost 2 cm It is perched freestanding off of matrix of massive chalcocite. This piece has textbook crystallography. I haven't seen one this fine, of this habit, save in books from the early 1800s such as Sowerby and Rashleigh. This exquisite miniature is complete all around and nearly pristine....probably because it has been in a box for over 150 years, as part of the collection of Traverso, a major Italian collector of the early 1800s. Ex. G.B. Traverso Collection.
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Rob Lavinsky, rob@irocks.com
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share specimen![Chalcocite from Dzhezkazgan Mine (Zhezkazgan Mine), Dzhezkazgan, Zhezqazghan Oblysy (Dzezkazgan Oblast'; Dzhezkazgan Oblast'; Djezkazgan Oblast'; Jezkazgan Oblast'), Kazakhstan [db_pics/mdpics/MD-220582a.jpg]](db_pics/mdpics/MD-220582a.jpg)
![Chalcocite from Dzhezkazgan Mine (Zhezkazgan Mine), Dzhezkazgan, Zhezqazghan Oblysy (Dzezkazgan Oblast'; Dzhezkazgan Oblast'; Djezkazgan Oblast'; Jezkazgan Oblast'), Kazakhstan [db_pics/mdpics/MD-220582b.jpg]](db_pics/mdpics/MD-220582b.jpg)
![Chalcocite from Bristol Copper Mine, Bristol, Hartford Co., Connecticut, USA [db_pics/mdpics/MD-225070a.jpg]](db_pics/mdpics/MD-225070a.jpg)
![Chalcocite from Chimney Rock Quarry (Houdaille Industries Quarry; The Bound Brook Quarry; Stavola Industries Quarry), Bridgewater Township, Somerset Co., New Jersey, USA [db_pics/mdpics/MD-225094a.jpg]](db_pics/mdpics/MD-225094a.jpg)
![Chalcocite from Bristol Copper Mine, Bristol, Hartford Co., Connecticut, USA [db_pics/mdpics/MD-225096a.jpg]](db_pics/mdpics/MD-225096a.jpg)
![Chalcocite from Bristol Copper Mine, Bristol, Hartford Co., Connecticut, USA [db_pics/mdpics/MD-225096b.jpg]](db_pics/mdpics/MD-225096b.jpg)
![Chalcocite from Bristol Copper Mine, Bristol, Hartford Co., Connecticut, USA [db_pics/mdpics/MD-225238a.jpg]](db_pics/mdpics/MD-225238a.jpg)
![Chalcocite from Bristol Copper Mine, Bristol, Hartford Co., Connecticut, USA [db_pics/mdpics/MD-225238b.jpg]](db_pics/mdpics/MD-225238b.jpg)
![Chalcocite from Cole Mine (Cole shaft; Cole No. 3), Bisbee, Warren District, Mule Mts, Cochise Co., Arizona, USA [db_pics/mdpics/MD-230572a.jpg]](db_pics/mdpics/MD-230572a.jpg)
![Chalcocite from Cole Mine (Cole shaft; Cole No. 3), Bisbee, Warren District, Mule Mts, Cochise Co., Arizona, USA [db_pics/mdpics/MD-230572b.jpg]](db_pics/mdpics/MD-230572b.jpg)
![Chalcocite, Bornite from Botallack Mine, Botallack, Botallack - Pendeen Area, St Just District, Cornwall, England, UK [db_pics/mdpics/MD-231839a.jpg]](db_pics/mdpics/MD-231839a.jpg)
![Chalcocite from Flambeau Mine, Ladysmith, Rusk Co., Wisconsin, USA [db_pics/mdpics/MD-23225a.jpg]](db_pics/mdpics/MD-23225a.jpg)
![Chalcocite from Flambeau Mine, Ladysmith, Rusk Co., Wisconsin, USA [db_pics/mdpics/MD-23666a.jpg]](db_pics/mdpics/MD-23666a.jpg)
![Chalcocite from Flambeau Mine, Ladysmith, Rusk Co., Wisconsin, USA [db_pics/mdpics/MD-236778a.jpg]](db_pics/mdpics/MD-236778a.jpg)
![Chalcocite from Flambeau Mine, Ladysmith, Rusk Co., Wisconsin, USA [db_pics/mdpics/MD-23742a.jpg]](db_pics/mdpics/MD-23742a.jpg)
![Chalcocite from Flambeau Mine, Ladysmith, Rusk Co., Wisconsin, USA [db_pics/mdpics/MD-237512a.jpg]](db_pics/mdpics/MD-237512a.jpg)
![Chalcocite from Flambeau Mine, Ladysmith, Rusk Co., Wisconsin, USA [db_pics/mdpics/MD-23894a.jpg]](db_pics/mdpics/MD-23894a.jpg)
![Chalcocite from Flambeau Mine, Ladysmith, Rusk Co., Wisconsin, USA [db_pics/mdpics/MD-24758a.jpg]](db_pics/mdpics/MD-24758a.jpg)
![Chalcocite from St Ives Consols (incl. Wellesley Mine; Wheal Mary), St Ives, St Ives District, Cornwall, England, UK [db_pics/mdpics/MD-253979a.jpg]](db_pics/mdpics/MD-253979a.jpg)
![Chalcocite from St Ives Consols (incl. Wellesley Mine; Wheal Mary), St Ives, St Ives District, Cornwall, England, UK [db_pics/mdpics/MD-253979b.jpg]](db_pics/mdpics/MD-253979b.jpg)