Chalcopyrite with Pyrite
Unknown Owner
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Semi lustrous golden crystals of chalcopyrite to 1.5 cm in size across the top of matrix with smaller but more lustrous pyrite crystals. Some damage present as seen, still in good hand specimen for this old classic.The mining city of Butte, Montana, famously known as "The Richest Hill on Earth," has a rich industrial history dating back to its founding as a gold and silver camp in the late nineteenth century before evolving into one of the world's largest copper producers. Geologically, the district is dominated by the Late Cretaceous Butte Quartz Monzonite, a major intrusive phase of the Boulder Batholith. Extensive hydrothermal activity fractured this granitic rock, allowing mineral-rich fluids to deposit a complex, zoning network of vein systems. These veins are celebrated for producing prolific quantities of copper, zinc, manganese, and lead ores, along with an exceptional diversity of primary and secondary sulfide and sulfosalt minerals that remain prized by collectors worldwide.
Product details
SpeciesPyrite, Chalcopyrite
SizeLarge Cabinet
Dimensions16.0 x 9.0 x 5.0 cm
Added on07/30/2026
LocalityUSA, Montana, Butte Mining District
Known provenance
| Date | Collector | Acquisition price |
|---|---|---|
| 08/2026 | Unknown Owner | Not disclosed |
| — | Weinrich Minerals | Not disclosed |
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Mineral guide
Learn about Pyrite
brilliant metallic luster, perfect cubes, and golden color; collectors prize affordable pieces to top specimens, with Navajún and Huanzala localities.Regional guide
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