Quartz coating Goethite stalactites
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Quartz coating goethite stalactites, 4.5cm, from the Portsmouth mine, Cuyuna Range. Seaman Museum specimen DM21944; Chris Stefano photo.
Product details
Added on02/13/2026
LocalityUSA, Minnesota, Portsmouth Mine
Publications
- Mineralogical Record 56 4 page 481
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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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