Millerite, Calcite, Chalcopyrite
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Millerite on calcite with chalcopyrite, 16 cm, from the River Products quarry, Coralville, Johnson County, Iowa. Self-collected in 1969. Geoffrey Crowe photo.
Product details
SpeciesMillerite, Chalcopyrite, Calcite
SizeLarge Cabinet
Dimensions16.0 cm
Added on02/13/2026
LocalityUSA, Iowa, River Products mine
Publications
- Mineralogical Record Mineral Collections In American Northeast page 284
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Mineral guide
Learn about Millerite
gold, needle-like crystals forming delicate sprays; prized for lustrous acicular bundles, fragility, and top localities yielding fine specimens.Regional guide
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