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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Brochantite from
Silver Gill, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK


Classification
Species:Brochantite
Formula:Cu4(SO4)(OH)6
Comments:Identified by XRD at Leeds University (Cooper & Stanley, 1990).
Habit:minute rounded scales (< 1mm); fibrous sprays apparently altering from langite (D.I. Green pers. comm.)
Confirmation
Validity:Confirmed
Confirmation Methods:XRD
Associated Minerals Based on Photo Data:
Linarite1
Data
Mineral Data:Click here to view Brochantite data
Locality Data:Click here to view Silver Gill, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
Data Identifiers
Mindat Occurrence Record ID:2388
Long-form Identifier:1:3:2388:7
GUID (UUID V4):0
Nearest other occurrences of Brochantite
0.3km (0.2 miles) ⓘThief Gills, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
0.4km (0.2 miles) ⓘHigher Roughton Gill (Balliway Rigg), Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
0.4km (0.3 miles) ⓘRoughton Gill Mine, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
0.7km (0.5 miles) ⓘMexico Mine, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
0.7km (0.5 miles) ⓘRed Gill Mine, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
1.5km (1.0 miles) ⓘBrae Fell Mine, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
2.1km (1.3 miles) ⓘHay Gill Copper Mine, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
2.2km (1.4 miles) ⓘShort Grain, Deer Hills, Caldbeck, Allerdale, Cumbria, England, UK
2.3km (1.4 miles) ⓘBrandy Gill Mine, Mungrisdale, Eden, Cumbria, England, UK
2.7km (1.7 miles) ⓘLow Pike north slopes, Caldbeck, Allerdale, Cumbria, England, UK
References
Cooper, M. P., Stanley, C. J. (1990) Minerals of the English Lake District - Caldbeck Fells. The Natural History Museum, London.
 
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