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Bournonite "cogwheel" with Quartz
Herodsfoot Mine, Lanreath, Liskeard, Cornwall, England, United Kingdom
Specimen size: 5.2 × 2.7 × 3.3 cm
Main crystal size: 2.5 × 1.7 cm
Mined about 1926
Former collection of Sir Arthur Russell / Former collection of the Folch duplicates
Photo: Reference Specimens (Author: Jordi Fabre)
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