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
Red Gill Mine, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK


Locality type:Mine
Classification
Species:Native Silver
Formula:Ag
Comments:Minute arborescent crystals generating acanthite in storage.
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:Confirmed
Confirmation Methods:XRD
EPMA
Data
Mineral Data:Click here to view Native Silver data
Locality Data:Click here to view Red Gill Mine, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
Data Identifiers
Mindat Occurrence Record ID:17659
Long-form Identifier:1:3:17659:8
GUID (UUID V4):0
Nearest other occurrences of Native Silver
0.7km (0.4 miles) ⓘRoughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
0.8km (0.5 miles) ⓘRoughton Gill Mine, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
0.9km (0.6 miles) ⓘBrae Fell Mine, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
1.1km (0.7 miles) ⓘHigher Roughton Gill (Balliway Rigg), Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
2.1km (1.3 miles) ⓘShort Grain, Deer Hills, Caldbeck, Allerdale, Cumbria, England, UK
3.3km (2.1 miles) ⓘDriggith Mine, Caldbeck, Allerdale, Cumbria, England, UK
16.2km (10.0 miles) ⓘForce Crag Mine, Coledale, Above Derwent, Allerdale, Cumbria, England, UK
37.1km (23.1 miles) ⓘShap Pink Quarry, Shap Rural, Eden, Cumbria, England, UK
56.5km (35.1 miles) ⓘDirt Pot Lead Smelt Mill slag locality, Allendale, Northumberland, England, UK
67.9km (42.2 miles) ⓘBollihope lead smelter slag locality, Stanhope, County Durham, England, UK
References
Wirth, M. (1989) Native silver from Red Gill Mine, Caldbeck Fells, Cumbria. Journal of the Russell Society, 2, 49.
Cooper, M. P., Stanley, C. J. (1990) Minerals of the English Lake District - Caldbeck Fells. The Natural History Museum, London.
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
Bridges, T.F., Green, D.I., Rumsey, M.S., Leppington, C.M. (2008) A review of the mineralisation at Red Gill Mine, Caldbeck Fells, Cumbria, England. Journal of the Russell Society, 11. 29-47
 
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