Ferruginous Quartz
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Ferruginous quartz, 9cm, from the Robert mine, Cuyuna Range. Peter Giangrande specimen, ex-Joe Heininger specimen. Jeff Krueger photo.
Product details
Species
Added on02/13/2026
Publications
- Mineralogical Record 56 4 page 118
Known provenance
| Date | Collector | Acquisition price |
|---|---|---|
| — | Joe Heininger | 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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