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14.0 x 8.5 x 4.0 cm. A gorgeous and LARGE (6.5 inches tall!) silver specimen from this classic locality that looks like a cluster of striking snakes, coiled together. For size, it just bowls you over. Moreover, it is very beautiful not just for the overall form, but because it has a unique patina of minute bornite and chalcopyrite crystals that gives it a "sparkle" in person. It is very different in aspect, thus, from what you normally see. Ex. Dr. Edward David Collection.
9.6 x 6.9 x 4.2 cm. A large chunk of iridescent bornite (Copper Iron Sulfide) from the classic Bisbee locality - a significant ore mineral sample from a historic place. This specimen has beautiful gold, blue and purple iridescence. Ex. Dave Stoudt Collection.
8.4 x 3.3 x 1.8 cm. A pretty specimen of the Bisbee ore-mineral bornite, iridescent, with shimmering purple, gold and blue colors, and happens to be attached to a strip of accenting matrix which makes it a pretty specimen compared to the normal all-bornite chunk. Ex. Stoudt Collection.
7.5 x 4.3 x 3.4 cm. Bornite is a copper iron sulfide, and at this rich mine in Zacatecas, it is an important ore that sometimes had thin fissures that were sometimes found with these veins or leafs of native silver filling them. Here, the silver leaf has been excavated so that it stands up dramatically off the iridescent bornite that served as host, creating quite a dazzling specimen of native silver, from a classic Mexican locality. The silver leaf here measures over 6 cm from end to end. Ex. Martin Zinn Collection.
8.7 x 5.6 x 2.0 cm. These crystals are very sharp for English bornite, and reach in size to 2.0 cm across. Perched on a translucent shard of crystallized, colorless quartz xls to 1.0 cm are several crystals of metallic gray, lustrous, pseudo-cubic crystals of bornite. Ex. Dr. Eric Asselborn Collection.
5.5 x 4.5 x 2 cm. This treelike cluster of 3-dimensional, thick bornites is exceptional for the aesthetics of the piece overall; and the exquisite accent of the complete and sharp bornites crowning the specimen mostly made up of unusual elongated bornite crystals that stand up and splay out like branches. Ex. Russell Jones Collection.
6 x 3.5 x 2.4 cm. A fine specimen comprised of a Bornite-coated Chalcopyrite crystal nestled in a bed of clear Quartz crystals and superb lustrous Pyrite crystals. The Bornite-coated crystal is up to 1.5 cm across. Ex. Charlie Key.
5.0 x 3.7 x 1.6 cm. Three large, sharp, discrete bornite crystals set on a contrasting quartz crystal plate from the famous Leonard Mine at Butte. The lightly iridescent crystals reach 2.0 cm, close to the maximum of 3.0 cm noted at Butte in the literature. Ex. George Elling Collection.
5 x 4.5 x 2.5 cm. The Dyck collection was well known for an extremely diverse selection of species, including many significant locality pieces that showed unusually good aesthetics. This is pretty for "what it is," in other words, or they wouldn't have owned it - but the piece also had to be significant from its find or locality as well. This large 3.7-cm bornite crystal is sharp and very fine for the locality with an unusually good lustre for this mine. It probably came out in the heyday here in the 1960s-1970s, and Butte today remains a classic locale for which many collectors cherish specimens. The mines here produced what certainly are the best bornites ever found in the US. Ex. Mel and Grace Dyck Collection.
5.0 x 3.3 x 2.5 cm. A classic, old-time and fine Cornwall specimen of moderately euhedral, dark gray bornite crystals on lumpy, oxidized, massive bornite matrix. A fine old-timer from the Carn Brea Mine, so named in 1832 from the consolidation of older mines.
7.5 x 6.4 x 4.5 cm. There is so much going on with this super-rich specimen from the classic Zacatecas mines. The iridescent blue color is covellite (copper sulfide), and the darker stuff is bornite (copper iron sulfide). But on this same specimen, you see both massive and crystallized silver, here and there in the form of fine wires. This old-time specimen is ample demonstration as to why the Zacatecas mines were so productive and valuable.
12.1 x 9.9 x 5.1 cm. This is a very large sheet of native silver still attached to some of the matrix in which it formed as a vein (you can see this chunk on the back side). The sheet of silver here can hardly be called a leaf, as that suggests fragility - and this is a thick and sturdy sheet of silver. The silver has a pretty iridescence about it from the bornite coating.
3.5 x 2.8 x 1.3 cm. A rare and fine combination specimen from the Tsumeb Mine. A 2.6 cm, striking vug is lined with gemmy and lustrous, emerald-green cuprian adamite crystals in a matrix of sparkly, peacock-iridescent, copper-red, massive bornite. A real bonus at the end of the vug on this rarity is a 3 mm long lathe of colorless, gypsum-like schultenite. Schultenite is a very rare lead arsenate and Tsumeb is the Type Locality. Combination specimens of this type were found (very few), only once, in the 1970s at Tsumeb, as reported in the 1977 Mineralogical Record TSUMEB special issue. Ex. Prosper Williams Collection – he was a very respected Tsumeb importer specializing in such rarities.
2.0 x 1.2 x 0.9 cm. Valleriite is an uncommon sulfosalt. A centrally located pod of bronze-colored valleriite microcrystals on matrix is very nicely accented by iridescent purple and blue bornite from the War Eagle Mine, Yukon Territory, Canada. The backside is richer in bornite, but still has some valleriite. Older, seldom available from the Dick Jones Collection.
8.4 x 6.5 x 3.7 cm. An attractive quartz cluster, unusual for the locality actually, with little enargite and bornite crystals, and some overgrown pyrite underneath. Classic combination for the locale. Ex. Harold Urish Collection.
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share specimen![Silver, Bornite, Chalcopyrite from Kongsberg, Buskerud, Norway [db_pics/mdpics/MD-164083a.jpg]](db_pics/mdpics/MD-164083a.jpg)
![Bornite from Lavender Open Pit Mine (Lavender pit), Bisbee, Warren District, Mule Mts, Cochise Co., Arizona, USA [db_pics/mdpics/MD-169713a.jpg]](db_pics/mdpics/MD-169713a.jpg)
![Bornite from Cole Mine (Cole shaft; Cole No. 3), Bisbee, Warren District, Mule Mts, Cochise Co., Arizona, USA [db_pics/mdpics/MD-170691a.jpg]](db_pics/mdpics/MD-170691a.jpg)
![Silver, Bornite from Noria Mine, San Pantaleón de la Noria (La Noria de San Pantaleón; Noria de la Pentalón), Mun. de Sombrerete, Zacatecas, Mexico [db_pics/mdpics/MD-171549a.jpg]](db_pics/mdpics/MD-171549a.jpg)
![Bornite, Quartz from Carn Brea Mine (incl. Tregajorran Mine), Carn Brea and Tincroft United Mine, Carn Brea area, Camborne - Redruth - St Day District, Cornwall, England, UK [db_pics/mdpics/MD-177849a.jpg]](db_pics/mdpics/MD-177849a.jpg)
![Bornite from Carn Brea Mine (incl. Tregajorran Mine), Carn Brea and Tincroft United Mine, Carn Brea area, Camborne - Redruth - St Day District, Cornwall, England, UK [db_pics/mdpics/MD-177850a.jpg]](db_pics/mdpics/MD-177850a.jpg)
![Bornite, Chalcopyrite, Pyrite, Quartz from Huaron Mining District, San Jose de Huayllay District, Cerro de Pasco, Daniel Alcides Carrión Province, Pasco Department, Peru [db_pics/mdpics/MD-180793a.jpg]](db_pics/mdpics/MD-180793a.jpg)
![Bornite, Chalcopyrite, Pyrite, Quartz from Huaron Mining District, San Jose de Huayllay District, Cerro de Pasco, Daniel Alcides Carrión Province, Pasco Department, Peru [db_pics/mdpics/MD-180793b.jpg]](db_pics/mdpics/MD-180793b.jpg)
![Bornite, Quartz from Leonard Mine, Butte, Butte District, Silver Bow Co., Montana, USA [db_pics/mdpics/MD-181686a.jpg]](db_pics/mdpics/MD-181686a.jpg)
![Bornite, Quartz from Leonard Mine, Butte, Butte District, Silver Bow Co., Montana, USA [db_pics/mdpics/MD-197443a.jpg]](db_pics/mdpics/MD-197443a.jpg)
![Bornite from Carn Brea Mine (incl. Tregajorran Mine), Carn Brea and Tincroft United Mine, Carn Brea area, Camborne - Redruth - St Day District, Cornwall, England, UK [db_pics/mdpics/MD-197777a.jpg]](db_pics/mdpics/MD-197777a.jpg)
![Bornite from Carn Brea Mine (incl. Tregajorran Mine), Carn Brea and Tincroft United Mine, Carn Brea area, Camborne - Redruth - St Day District, Cornwall, England, UK [db_pics/mdpics/MD-197777b.jpg]](db_pics/mdpics/MD-197777b.jpg)
![Silver, Bornite, Covellite from Sabino Mine, San Martín, Mun. de Sombrerete, Zacatecas, Mexico [db_pics/mdpics/MD-209775a.jpg]](db_pics/mdpics/MD-209775a.jpg)
![Silver, Bornite, Covellite from Sabino Mine, San Martín, Mun. de Sombrerete, Zacatecas, Mexico [db_pics/mdpics/MD-209775b.jpg]](db_pics/mdpics/MD-209775b.jpg)
![Silver, Bornite from San Martín Mine, San Martín, Mun. de Sombrerete, Zacatecas, Mexico [db_pics/mdpics/MD-214778a.jpg]](db_pics/mdpics/MD-214778a.jpg)
![Adamite (Var: Cuprian Adamite), Schultenite, Bornite from Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia [db_pics/mdpics/MD-216060a.jpg]](db_pics/mdpics/MD-216060a.jpg)
![Adamite (Var: Cuprian Adamite), Schultenite, Bornite from Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia [db_pics/mdpics/MD-216060b.jpg]](db_pics/mdpics/MD-216060b.jpg)
![Adamite (Var: Cuprian Adamite), Schultenite, Bornite from Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia [db_pics/mdpics/MD-216060c.jpg]](db_pics/mdpics/MD-216060c.jpg)
![Valleriite, Bornite from War Eagle Mine, Whitehorse Copper Belt, Whitehorse Mining District, Yukon Territory, Canada [db_pics/mdpics/MD-222506a.jpg]](db_pics/mdpics/MD-222506a.jpg)
![Valleriite, Bornite from War Eagle Mine, Whitehorse Copper Belt, Whitehorse Mining District, Yukon Territory, Canada [db_pics/mdpics/MD-222506b.jpg]](db_pics/mdpics/MD-222506b.jpg)
![Quartz, Pyrite, Enargite, Bornite from Butte, Butte District, Silver Bow Co., Montana, USA [db_pics/mdpics/MD-230140a.jpg]](db_pics/mdpics/MD-230140a.jpg)
![Quartz, Pyrite, Enargite, Bornite from Butte, Butte District, Silver Bow Co., Montana, USA [db_pics/mdpics/MD-230140b.jpg]](db_pics/mdpics/MD-230140b.jpg)