$285Median
2253Sold (12 mo)
$500Last sale
Quartz from Nancy Hanks Mine, Colorado, USA
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Green lustrous crystallized fluorite across the top of a purple quartz matrix. The backside of this has been cut and polished. In good condition.The Nancy Hanks Mine, located in Nancy Hanks Gulch within Unaweep Canyon, Mesa County, Colorado, originated during the late nineteenth-century regional copper rush and later saw sporadic evaluation for fluorspar. Geologically, the site is situated in a unique landscape where mineralized fissure veins and fracture systems cut through ancient Precambrian crystalline rocks—primarily granite and gneiss—that are unconformably overlain by younger sedimentary layers. Originally developed via shafts and tunnels for base and precious metal extraction, the mine and its surrounding district later gained recognition among mineral collectors for producing fine specimens of quartz, amethyst, and sea-green fluorite.
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 Quartz
a versatile mineral with clear, milky, and colored varieties; crystal forms, formation clues, and tips for identifying amethyst and citrine.Regional guide
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