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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Caledonite from
Llechwedd Helyg Mine (Willow Bank Mine), Pen-bont Rhydybeddau, Trefeirig, Ceredigion, Wales, UK


01931830017367609971726.jpg
Caledonite

Llechwedd Helyg Mine, Pen-bont Rhydybeddau, Trefeirig, Ceredigion, Wales, UK
04019940017272016995726.jpg
Caledonite, etc.

Llechwedd Helyg Mine, Pen-bont Rhydybeddau, Trefeirig, Ceredigion, Wales, UK
06077270017272016939458.jpg
Caledonite, etc.

Llechwedd Helyg Mine, Pen-bont Rhydybeddau, Trefeirig, Ceredigion, Wales, UK
04097020017367916661701.jpg
Caledonite, etc.

Llechwedd Helyg Mine, Pen-bont Rhydybeddau, Trefeirig, Ceredigion, Wales, UK
01931830017367609971726.jpg
Caledonite

Llechwedd Helyg Mine, Pen-bont Rhydybeddau, Trefeirig, Ceredigion, Wales, UK
09511610017367637489498.jpg
Caledonite, etc.

Llechwedd Helyg Mine, Pen-bont Rhydybeddau, Trefeirig, Ceredigion, Wales, UK
07113070017367637375655.jpg
Caledonite, etc.

Llechwedd Helyg Mine, Pen-bont Rhydybeddau, Trefeirig, Ceredigion, Wales, UK
04097020017367916661701.jpg
Caledonite, etc.

Llechwedd Helyg Mine, Pen-bont Rhydybeddau, Trefeirig, Ceredigion, Wales, UK
01931830017367609971726.jpg
Caledonite

Llechwedd Helyg Mine, Pen-bont Rhydybeddau, Trefeirig, Ceredigion, Wales, UK
04019940017272016995726.jpg
Caledonite, etc.

Llechwedd Helyg Mine, Pen-bont Rhydybeddau, Trefeirig, Ceredigion, Wales, UK
06077270017272016939458.jpg
Caledonite, etc.

Llechwedd Helyg Mine, Pen-bont Rhydybeddau, Trefeirig, Ceredigion, Wales, UK
00926290017375371998653.jpg
Caledonite, etc.

Llechwedd Helyg Mine, Pen-bont Rhydybeddau, Trefeirig, Ceredigion, Wales, UK
Locality type:Mine
Classification
Species:Caledonite
Formula:Pb5Cu2(SO4)3(CO3)(OH)6
Comments:Light blue xls to 0.5mm, associated with susannite.
Habit:Acicular
Colour:Pale blue
Luminescent properties:None
Quality for species:Poor for species, only of interest for locality collectors. (#)
Abundance at site:Very Rare
Confirmation
Validity:Confirmed
Confirmation Methods:XRD
Confirmation Details:Where Tested and Reference ID: NHM London
Associated Minerals Based on Photo Data:
Susannite15
Mattheddleite7
Unnamed (Cu-Pb Sulfate)4
Steverustite2
Redgillite2
Linarite1
Schmiederite1
Brochantite1
Cerussite1
Data
Mineral Data:Click here to view Caledonite data
Locality Data:Click here to view Llechwedd Helyg Mine (Willow Bank Mine), Pen-bont Rhydybeddau, Trefeirig, Ceredigion, Wales, UK
Photo GalleryView Gallery (6 photos)
Data Identifiers
Mindat Occurrence Record ID:15216
Long-form Identifier:1:3:15216:3
GUID (UUID V4):0
Nearest other occurrences of Caledonite
1.9km (1.2 miles) ⓘDaren Mine (Old Daren Mine; Darren Consolidated Mine; Daren United Mine; Great Darren Mine; Darren Mine), Pen-bont Rhydybeddau, Trefeirig, Ceredigion, Wales, UK
3.2km (2.0 miles) ⓘBwlchrhennaid Mine (Level Newydd Mine), Pen-bont Rhydybeddau, Trefeirig, Ceredigion, Wales, UK
3.9km (2.4 miles) ⓘBwlch Glas Mine, Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK
5.4km (3.4 miles) ⓘHafan Mine (Canninog Mine; Bwlch Canninog Mine), Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK
5.8km (3.6 miles) ⓘPenpontbren Mine (Penypontbren Mine; Penpombren Mine), Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK
6.2km (3.9 miles) ⓘPenybanc Mine, Tre-Taliesin, Llangynfelyn, Ceredigion, Wales, UK
6.8km (4.2 miles) ⓘEaglebrook Mine, Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK
6.8km (4.2 miles) ⓘBryn-yr-Afr Mine, Ponterwyd, Trefeirig, Ceredigion, Wales, UK
6.9km (4.3 miles) ⓘBrynarian Mine (Cardigan Bay Consols Mine), Tre-Taliesin, Llangynfelyn, Ceredigion, Wales, UK
8.1km (5.1 miles) ⓘEsgair Hir & Esgair Fraith mines (Cambrian Mine; Cardigan Consolidated Mine; Welsh Potosi Mine; Kylon Potosi Mine), Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK
References
Steve Rust collection
 
and/or  
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