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Calcite - image 1
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Calcite
Calcite "butterfly twin," 10.8 cm, from Egremont, West Cumberland Iron Field, Cumbria, England. In the late 19th and early 20th centuries the West Cumberland Iron Field was one of the world’s most prolific mineral localities, producing beautiful barite, fluorite and calcite specimens by the thousands. Fine calcite was particularly abundant in the mines around Egremont, where twins like this one were well known from the Gillfoot mine—though most labels simply say "Egremont."
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The Mineralogical Museum, University of Delaware
Product details
Species
Calcite
SizeCabinet
Dimensions10.8 cm
Locality
UK, England, Egremont
Publications
  • Mineralogical Record Mineral Collection University Of Delaware page 35
Added on02/13/2026
Known provenance
Unknown date
The Mineralogical Museum, University of Delaware
Not disclosed—
Species and Locality Wiki Pages
Calcite
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