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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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Chrysocolla from
Wheal Unity, Gwennap, Cornwall, England, UK


06977820017362144503588.jpg
Chrysocolla, etc.

Wheal Unity, Gwennap, Cornwall, England, UK
01455290017485222249346.jpg
Chrysocolla, etc.

Wheal Unity, Gwennap, Cornwall, England, UK
07820450017485222233247.jpg
Chrysocolla, etc.

Wheal Unity, Gwennap, Cornwall, England, UK
03777480017488293637839.jpg
Chrysocolla, etc.

Wheal Unity, Gwennap, Cornwall, England, UK
09929500017467639058157.jpg
Chrysocolla, etc.

Wheal Unity, Gwennap, Cornwall, England, UK
06143380017484666088245.jpg
Chrysocolla, etc.

Wheal Unity, Gwennap, Cornwall, England, UK
08778840017484666362931.jpg
Chrysocolla, etc.

Wheal Unity, Gwennap, Cornwall, England, UK
08182410017484667716522.jpg
Chrysocolla, etc.

Wheal Unity, Gwennap, Cornwall, England, UK
06977820017362144503588.jpg
Chrysocolla, etc.

Wheal Unity, Gwennap, Cornwall, England, UK
08286490017488293632079.jpg
Chrysocolla, etc.

Wheal Unity, Gwennap, Cornwall, England, UK
02064760017488293646913.jpg
Chrysocolla, etc.

Wheal Unity, Gwennap, Cornwall, England, UK
03777480017488293637839.jpg
Chrysocolla, etc.

Wheal Unity, Gwennap, Cornwall, England, UK
Locality type:Mine
Classification
Species:Chrysocolla
Formula:Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Cuprite6
Olivenite4
Data
Mineral Data:Click here to view Chrysocolla data
Locality Data:Click here to view Wheal Unity, Gwennap, Cornwall, England, UK
Photo GalleryView Gallery (2 photos)
Data Identifiers
Mindat Occurrence Record ID:3643
Long-form Identifier:1:3:3643:6
GUID (UUID V4):0
Nearest other occurrences of Chrysocolla
0.6km (0.4 miles) ⓘWheal Gorland, St Day, Cornwall, England, UK
0.7km (0.5 miles) ⓘWheal Muttrall, Wheal Gorland, St Day, Cornwall, England, UK
0.8km (0.5 miles) ⓘWheal Maid, Gwennap, Cornwall, England, UK
0.9km (0.6 miles) ⓘCarharrack Mine, Gwennap, Cornwall, England, UK
1.0km (0.6 miles) ⓘWest Wheal Virgin, Great Consolidated Mines, Clifford Amalgamated Mines, Gwennap, Cornwall, England, UK
2.2km (1.4 miles) ⓘTing Tang Mine, Carharrack, Cornwall, England, UK
2.3km (1.5 miles) ⓘWheal Moyle, Gwennap, Cornwall, England, UK
3.7km (2.3 miles) ⓘWheal Trefusis (incl. East Wheal Trefusis), Redruth, Cornwall, England, UK
4.2km (2.6 miles) ⓘPenstruthal Mine (Bestruthal Mine; incl. North & South Penstruthal Mines), Lanner, Cornwall, England, UK
4.6km (2.9 miles) ⓘCopper Hill Mine, Redruth, Cornwall, England, UK
References
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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