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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Native Silver from
Force Crag Mine, Coledale, Above Derwent, Allerdale, Cumbria, England, UK


02202890017410801104487.jpg
Native Silver, etc.

Force Crag Mine, Coledale, Above Derwent, Allerdale, Cumbria, England, UK
02202890017410801104487.jpg
Native Silver, etc.

Force Crag Mine, Coledale, Above Derwent, Allerdale, Cumbria, England, UK
09008590017409904863209.jpg
Native Silver, etc.

Force Crag Mine, Coledale, Above Derwent, Allerdale, Cumbria, England, UK
Locality type:Mine
Classification
Species:Native Silver
Formula:Ag
Special Storage/
Display Requirements:		Storage in a low humidity environment seems to prevent the formation of acanthite (silver sulphide), which if allowed to proceed unchecked can completely replace the silver on a specimen in a period of a few years.
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Cerussite1
Galena1
Data
Mineral Data:Click here to view Native Silver data
Locality Data:Click here to view Force Crag Mine, Coledale, Above Derwent, Allerdale, Cumbria, England, UK
Data Identifiers
Mindat Occurrence Record ID:43387
Long-form Identifier:1:3:43387:3
GUID (UUID V4):0
Nearest other occurrences of Native Silver
15.8km (9.8 miles) ⓘHigher Roughton Gill (Balliway Rigg), Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
16.2km (10.0 miles) ⓘRed Gill Mine, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
16.3km (10.1 miles) ⓘRoughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
16.3km (10.2 miles) ⓘRoughton Gill Mine, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
17.1km (10.6 miles) ⓘBrae Fell Mine, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
18.1km (11.3 miles) ⓘShort Grain, Deer Hills, Caldbeck, Allerdale, Cumbria, England, UK
18.7km (11.6 miles) ⓘDriggith Mine, Caldbeck, Allerdale, Cumbria, England, UK
38.1km (23.7 miles) ⓘShap Pink Quarry, Shap Rural, Eden, Cumbria, England, UK
69.4km (43.1 miles) ⓘDirt Pot Lead Smelt Mill slag locality, Allendale, Northumberland, England, UK
78.6km (48.8 miles) ⓘBollihope lead smelter slag locality, Stanhope, County Durham, England, UK
References
Jarvis, Adam P., Catherine J. Gandy, and John A. Webb. 2023. "Controls on the Generation and Geochemistry of Neutral Mine Drainage: Evidence from Force Crag Mine, Cumbria, UK" Minerals 13, no. 5: 592. https://doi.org/10.3390/min13050592
Green, D.I., McCallum, D., Wood, M. (1997) Supergene Cu, Pb, Zn and Ag Minerals from Force Crag Mine, Coledale, Cumbria. UK Journal of Mines and Minerals 18, 10-14
Green, D.I., Bridges, T.F., Rumsey, M.S., Leppington, C.M., Tindle, A.G. (2008) A review of the mineralogy of the Roughton Gill Mines, Caldbeck Fells, Cumbria: Part 2 The Roughton Gill South Vein on Balliway Rigg. Journal of the Russell Society, 11. 3-28
 
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