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11 specimens listed
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SOLD Chalcopyrite - exceptional ball form
stock #SOLD 23.1-391
Tonglushan Mine, Daye County, Huangshi Prefecture
Hubei Province, China
4.1 x 2.6 x 2.3 CM (miniature)
price: $0
Pre Tucson

The discovery of these incredible Chalcopyrite balls at Tonglushan (China) in 2018 made big waves in the mineral world. For a while it was rumored these were altered or faked but as they were well studied and examined they have become accepted as fully natural. There is a little resemblance to some old ball specimens of Chalcopyrite from both Bristol, Connecticut and Cornwall, England but these are far more perfect, complete and have a nice patina as well. The find was a one off, no new examples have been found since. This specimen of 5 connected balls shows well the habit and form, is in perfect condition and looks great from any angle. The large ball is 2.3 CM across. A super addition to any Sulphide suite, Chinese collection or to a display that has strange and wonderful minerals!

Chalcopyrite with Quartz - classic British
stock #23.FC-012
Cornwall, England
6.8 x 4.3 x 2.7 CM (cabinet)
price: $950
Spring 23

A killer Cornish Chalcopyrite! Excellent sharp irridescent Chalcopyrites in several habits mixed with Quartz crystals on a Chalcopyrite matrix. This looks very much like some specimens in the British Museum collection, those did not have any mine attribution, this one however is credited to the Redruth area on an older label. We have never seen anything like this from Redruth but perhaps the community of Cornish collectors have better information on that detail. We are informed that many old specimens with Redruth Labels came in fact from the nearby Carn Brea, this seems a likely possibility. No matter the mine, this has a classic Cornish look, and the crystals are especially bright with fine patina in person. There is one elongated habit Chalcopyrite crystal that is especially fine, this is a habit that is quite rare worldwide. Though Chalcopyrite is a common mineral, fine crystals are surprisingly rare and these are outstanding. Excellent display that is better in person.

Chalcopyrite with Galena - classic Mexican
stock #0123-JM-3321
Concepcion del Oro
Aguascalientes, Mexico
8.5 x 5.4 4.3 CM (cabinet)
price: $2200
Spring 23

Fine large Chalcopyrite crystals are surprisingly rare worldwide. This is a superb piece and outstanding from this old Mexican locality. Zacatecas is a classic locale and it has been noted for some fine Chalcopyrites, probably the best ever found in Mexico and among the best from all of North America. These are superb crystals, sharp, sizable and with a great patina. Overall the esthetics and arrangement are superb on this piece. Ex John Marshall collection, this has small Quartz and some minor Galena as well. The largest twin is almost 4 CM across but 2 CM is more typical. This is certainly an important Mexican specimen, the crystals are equal to the very best we have seen in any museum. It dates back to the 1970 era.

Chalcopyrite - classic, fine twinned crystal
stock #21.1-132
Biersdorf, Daaden, Daaden-Herdorf, Altenkirchen District
Rhineland-Palatinate, Germany
6 x 4.9 x 3.4 CM (cabinet)
price: $1650
Post Tucson 2022

A brilliant golden Chalco crystal (3 CM across) perfectly twinned and perched on contrasting matrix. From the old mining region of Biersdorf (Rhineland-Palatinate, Germany) which is well-known for excellent Chalcopyrites, among the very best known in Germany. Even among the many good pieces from here, this is an incredible standout specimen. We do not have an exact mine name for this piece, but both the Fusseberg and Freidrich-Wilhelm mines are likely candidates. The perfection of the star-like twin is impressive, this is an excellent Chalcopyrite from anyplace. Highly esthetic, lustrous metallic on the front side and with a dark patina on the back, this is in excellent condition with no damage which is rare on this soft, brittle mineral. A superb German classic.

Chalcopyrite with Sphalerite
stock #7.AE-260
Huaron Mines, Huaron Mining District, San jose de Huayllay District
Pasco Department, Peru
6.3 x 5.4 x 1.8 CM (cabinet)
price: $290
New Year 22

Large well-formed Chalcopyrite crystals surround sharp, bright lustrous black Sphalerites. Ex Gene Meieran collection, this is in excellent condition, from Huaron. An earlier label gives an incorrect locality however this is classic for the mine. The largest complete Chalcopyrite crystal is 4.4 CM across. The display face of this piece is remarkable in that it is undamaged. Chalcopyrite is a very delicate mineral and larger crystals almost always have some "issues". The Sphalerite crystals are complete and undamaged as well, what may look like breakage in some photos is simply complex stepped faces that have epitaxial structures.

Chalcopyrite on Sphalerite
stock #13.1-200
Huaron Mines, Huaron Mining District, San jose de Huayllay District
Pasco Department, Peru
6.9 x 5.1 x 4.3 CM (cabinet)
price: $500
new year 2021

two large, well formed and complete Chalcopyrite crystals perched esthetically on a crystallized Sphalerite matrix. While Chalcopyrite is not a rare mineral, very good crystals like these are very uncommon. These are in perfect undamaged condition reaching 4.3 CM and having a fine brassy patina, these are classic textbook crystals. On several faces are a sprinkle of tiny bright golden Pyrite crystals that add a nice sparkle. From Huaron Mining district of Peru this specimen is more than 20 years old, a fine heavy Sulfide piece that looks great from most any angle.

Chalcopyrite on Calcite
stock #16.1-480-(CN4124)
Concepcion del Oro
Zacatecas, Mexico
9.7 x 7.4 x 6.4 CM (cabinet)
price: $880
Spring 2020

A large scalenohedral Calcite crystal is encrusted with Chalcopyrite crystals many of which are dusted with sparkling drusy Quartz. The Chalcopyrite is mostly coated with dark Bornite patina which makes a strong contrast as well. Aside from a few very small bruises the Chalcopyrite is in fine condition, has classic good form and overall is a very esthetic example from this famed locale. Ex Charles M Noll collection, I have never seen a better example from Concepcion del Oro, and this is a super esthetic Chalcopyrite from anyplace.

Chalcopyrite with Galena and Sphalerite
stock #AX-22-137
Borieva Mine, Madan, Rhodope Mts.
Smolyan Oblast, Bulgaria
10.8 x 7.7 x 6.8 CM (cabinet)
price: $2600

Great Chalcopyrite crystals are remarkably rare, these are superb, sharp and quite large. Set on a "melted" Galena matrix with scattered crystals of Sphalerite, the Chalcopyrites are perfect, no chips, cracks or any damage. These have a nice patina and dark brassy color that sets off the well defined striations. Textbook perfect forms these show both single crystals and twins in fine detail. We try to grab any great Chalcopyrite crystals from this region. I believe they are some of the best ever found when they are this well defined. In person this is especially impressive and it is one of the most esthetic we have seen. Individual crystals are just under 5 CM, and the contrast with the matrix is strong. This specimen is also a "floater" it is crystalized all around and displays fine from most any angle.