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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Namuwite from
Frongoch Mine, Pontrhydygroes, Upper Llanfihangell-y-Creuddyn, Ceredigion, Wales, UK


06576340017271925365909.jpg
Namuwite

Frongoch Mine, Pontrhydygroes, Upper Llanfihangell-y-Creuddyn, Ceredigion, Wales, UK
08894390017272019719342.jpg
Namuwite, etc.

Frongoch Mine, Pontrhydygroes, Upper Llanfihangell-y-Creuddyn, Ceredigion, Wales, UK
06576340017271925365909.jpg
Namuwite

Frongoch Mine, Pontrhydygroes, Upper Llanfihangell-y-Creuddyn, Ceredigion, Wales, UK
08894390017272019719342.jpg
Namuwite, etc.

Frongoch Mine, Pontrhydygroes, Upper Llanfihangell-y-Creuddyn, Ceredigion, Wales, UK
06576340017271925365909.jpg
Namuwite

Frongoch Mine, Pontrhydygroes, Upper Llanfihangell-y-Creuddyn, Ceredigion, Wales, UK
08894390017272019719342.jpg
Namuwite, etc.

Frongoch Mine, Pontrhydygroes, Upper Llanfihangell-y-Creuddyn, Ceredigion, Wales, UK
Locality type:Mine
Classification
Species:Namuwite
Formula:Zn4(SO4)(OH)6 · 4H2O
Comments:Very pale blue-green crystals to 0.5mm + (XRD), with langite, wroewolfeite, susannite, hydrocerussite.
Habit:Platy pseudohexagonal
Colour:Pale blue-green
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:
Hemimorphite2
Bechererite1
Susannite1
Data
Mineral Data:Click here to view Namuwite data
Locality Data:Click here to view Frongoch Mine, Pontrhydygroes, Upper Llanfihangell-y-Creuddyn, Ceredigion, Wales, UK
Photo GalleryView Gallery (2 photos)
Data Identifiers
Mindat Occurrence Record ID:18310
Long-form Identifier:1:3:18310:9
GUID (UUID V4):0
Nearest other occurrences of Namuwite
6.6km (4.1 miles) ⓘLlywernog Mine (Ponterwyd Mine), Ponterwyd, Cwmrheidol, Ceredigion, Wales, UK
8.3km (5.2 miles) ⓘBwlchrhennaid Mine (Level Newydd Mine), Pen-bont Rhydybeddau, Trefeirig, Ceredigion, Wales, UK
14.9km (9.2 miles) ⓘEaglebrook Mine, Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK
16.9km (10.5 miles) ⓘEsgair Hir & Esgair Fraith mines (Cambrian Mine; Cardigan Consolidated Mine; Welsh Potosi Mine; Kylon Potosi Mine), Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK
22.8km (14.1 miles) ⓘDyfngwm mine, Penegoes, Powys, Wales, UK
24.0km (14.9 miles) ⓘDylife Mine (Pen Dylife Mine; Esgairgaled Mine; Llechwedd Ddu Mine; Blaen Twymyn Mine), Dylife, Machynlleth, Powys, Wales, UK
83.9km (52.1 miles) ⓘAberllyn Mine, Betws-y-coed, Conwy, Wales, UK
References
Green, D.I., Rust, S.A., Mason, J.S. (1996) Classic British mineral localities: Frongoch mine, Dyfed. UK Journal of Mines and Minerals 17, Rockbottom Publications. 29-39
Day, Harry (1999) BMS Database, British Micromount Society.
Rust, Steve A. (2019) Minerals of the Frongoch Mine. Published by the author, 180 pages. ISBN 978-1-9162641-0-6.
 
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