Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Amethyst from
Pednandrea Mine (Pedn-an-Drea Mine), Redruth, Cornwall, England, UK


Locality type:Mine
Classification
Species:Quartz var: Amethyst
Formula:SiO2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Amethyst data
Locality Data:Click here to view Pednandrea Mine (Pedn-an-Drea Mine), Redruth, Cornwall, England, UK
Data Identifiers
Mindat Occurrence Record ID:518
Long-form Identifier:1:3:518:4
GUID (UUID V4):0
Nearest other occurrences of Amethyst
0.9km (0.6 miles) ⓘWheal Grambler (East Wheal Sparnon), St Day, Cornwall, England, UK
1.5km (0.9 miles) ⓘWheal Uny, Redruth, Cornwall, England, UK
1.6km (1.0 miles) ⓘCathedral Mine, Busveal, St Day, Cornwall, England, UK
2.1km (1.3 miles) ⓘWheal Buller, Wheal Buller and Beauchamp, Redruth, Cornwall, England, UK
3.0km (1.9 miles) ⓘEast Pool Mine, Pool, Carn Brea, Cornwall, England, UK
3.5km (2.2 miles) ⓘWheal Unity, Gwennap, Cornwall, England, UK
4.5km (2.8 miles) ⓘDolcoath Mine, Camborne, Cornwall, England, UK
4.6km (2.9 miles) ⓘAle and Cakes Mine, United Mines (Gwennap United Mines), Clifford Amalgamated Mines, Gwennap, Cornwall, England, UK
6.9km (4.3 miles) ⓘWheal Jane, Kea, Cornwall, England, UK
9.2km (5.7 miles) ⓘSeal Hole Mine, St Agnes Consols (Polberro Consols), St Agnes, Cornwall, England, UK
References
Phillips, William (1823) An Elementary Introduction to Mineralogy (3rd ed.)
Hogg, Thomas (1825) A Manual of Mineralogy - In which is shown how much Cornwall contributes to the illustration of the science. W. Polybank High Cross, Truro.
Hall, Townshend M. (1868) The Mineralogist's Directory: or, a guide to the Principal Mineral Localities in the United Kingdom of Great Britain and Ireland. Edward Stanford.
Collins, J. H. (1871) A Handbook to the Mineralogy of Cornwall and Devon. Heard and Sons, Truro.
 
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