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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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Olivenite from
Wheal Muttrall, Wheal Gorland, St Day, Cornwall, England, UK


08290190017362149743489.jpg
Olivenite

Wheal Muttrall, Wheal Gorland, St Day, Cornwall, England, UK
07810030017271996686768.jpg
Olivenite, etc.

Wheal Muttrall, Wheal Gorland, St Day, Cornwall, England, UK
04230530017271996863085.jpg
Olivenite, etc.

Wheal Muttrall, Wheal Gorland, St Day, Cornwall, England, UK
03647830017367609884765.jpg
Olivenite, etc.

Wheal Muttrall, Wheal Gorland, St Day, Cornwall, England, UK
08290190017362149743489.jpg
Olivenite

Wheal Muttrall, Wheal Gorland, St Day, Cornwall, England, UK
03476740017367609894885.jpg
Olivenite, etc.

Wheal Muttrall, Wheal Gorland, St Day, Cornwall, England, UK
05637370017362149444581.jpg
Olivenite, etc.

Wheal Muttrall, Wheal Gorland, St Day, Cornwall, England, UK
08823990017364964189174.jpg
Olivenite, etc.

Wheal Muttrall, Wheal Gorland, St Day, Cornwall, England, UK
08290190017362149743489.jpg
Olivenite

Wheal Muttrall, Wheal Gorland, St Day, Cornwall, England, UK
06618700017271996804663.jpg
Olivenite, etc.

Wheal Muttrall, Wheal Gorland, St Day, Cornwall, England, UK
04230530017271996863085.jpg
Olivenite, etc.

Wheal Muttrall, Wheal Gorland, St Day, Cornwall, England, UK
03647830017367609884765.jpg
Olivenite, etc.

Wheal Muttrall, Wheal Gorland, St Day, Cornwall, England, UK
Locality type:Mine
Classification
Species:Olivenite
Formula:Cu2(AsO4)(OH)
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Limonite3
Pharmacosiderite1
Data
Mineral Data:Click here to view Olivenite data
Locality Data:Click here to view Wheal Muttrall, Wheal Gorland, St Day, Cornwall, England, UK
Photo GalleryView Gallery (3 photos)
Data Identifiers
Mindat Occurrence Record ID:8213
Long-form Identifier:1:3:8213:6
GUID (UUID V4):0
Nearest other occurrences of Olivenite
0.2km (0.1 miles) ⓘWheal Gorland, St Day, Cornwall, England, UK
0.7km (0.5 miles) ⓘWheal Unity, Gwennap, Cornwall, England, UK
0.8km (0.5 miles) ⓘWheal Jewel, Gwennap, Cornwall, England, UK
1.0km (0.6 miles) ⓘCarharrack Mine, Gwennap, Cornwall, England, UK
1.3km (0.8 miles) ⓘWest Wheal Virgin, Great Consolidated Mines, Clifford Amalgamated Mines, Gwennap, Cornwall, England, UK
1.3km (0.8 miles) ⓘWheal Maid Decline, Gwennap, Cornwall, England, UK
1.7km (1.1 miles) ⓘCathedral Mine, Busveal, St Day, Cornwall, England, UK
1.8km (1.1 miles) ⓘTing Tang Mine, Carharrack, Cornwall, England, UK
2.2km (1.4 miles) ⓘUnited Mines (Gwennap United Mines), Clifford Amalgamated Mines, Gwennap, Cornwall, England, UK
2.8km (1.7 miles) ⓘPednandrea Mine (Pedn-an-Drea Mine), Redruth, Cornwall, England, UK
References
Phillips, William (1823) An Elementary Introduction to Mineralogy (3rd ed.)
Embrey, Peter G., Symes, Robert F. (1987) Minerals of Cornwall and Devon. British Museum (Natural History) and the Mineralogical Record, Inc., London and Tucson, AZ.
 
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