$250Median
334Sold (12 mo)
$40Last sale
Chalcopyrite from Colorado, USA
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A loose grouping of large thick chalcopyrite crystals without matrix. Some damage present as seen. The specimen comes with a label from the collection of Ray DeMark.The Alice Mine, located in the Fall River district of Clear Creek County, Colorado, sits within a rugged mountain setting characterized by Precambrian crystalline rocks intruded by Tertiary-age porphyritic bodies. The site became prominent in the late nineteenth century as a major center for early placer and hydraulic mining operations that targeted auriferous surface deposits, later transitioning to lode mining as prospectors pursued deeper veins. While initial surface extraction yielded notable free gold, subsequent underground operations struggled with complex, low-grade mineralogy that proved difficult to process profitably with contemporary technology. Ownership changed hands numerous times across several decades, seeing brief revivals through various leasing efforts and mid-century development companies before activity ultimately ceased, leaving the area as a historic ghost town and a destination for historical research.
Product details
Current owner
Unknown Owner
- Acquired
- Oct 2026
Previous owners
| Date | Collector | Acquisition price |
|---|---|---|
| — | Weinrich Minerals | Not disclosed |
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Mineral guide
Learn about Chalcopyrite
brassy-gold, metallic crystals with disphenoid forms and rainbow tarnish; prized for luster, contrast, and localities like Dalnegorsk.Regional guide
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