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


Locality type:Mine
Classification
Species:Goethite
Formula:Fe3+O(OH)
Habit:botryoidal and stalactitic crusts
Colour:Various shades of yellow to red-brown and black
Quality for species:Poor for species, only of interest for locality collectors. (#)
Abundance at site:Very common
Confirmation
Validity:Confirmed
Confirmation Methods:Visually Identified
Data
Mineral Data:Click here to view Goethite data
Locality Data:Click here to view Frongoch Mine, Pontrhydygroes, Upper Llanfihangell-y-Creuddyn, Ceredigion, Wales, UK
Data Identifiers
Mindat Occurrence Record ID:39774
Long-form Identifier:1:3:39774:8
GUID (UUID V4):0
Nearest other occurrences of Goethite
5.9km (3.6 miles) ⓘMynach Vale Mine (Ty Gwyn Mine; De Broke Mine), Devil's Bridge, Upper Llanfihangell-y-Creuddyn, Ceredigion, Wales, UK
6.1km (3.8 miles) ⓘLlwyn Llwyd Mine, Ysbyty Ystwyth, Ceredigion, Wales, UK
8.3km (5.2 miles) ⓘBwlchrhennaid Mine (Level Newydd Mine), Pen-bont Rhydybeddau, Trefeirig, Ceredigion, Wales, UK
8.6km (5.4 miles) ⓘCastell Mine (Dyffryn Castell Mine; New Castell Mine; West Esgair Lle Mine; Gwaithddu Mine; Cripiau Bach Mine), Ponterwyd, Cwmrheidol, Ceredigion, Wales, UK
9.7km (6.0 miles) ⓘDaren Mine (Old Daren Mine; Darren Consolidated Mine; Daren United Mine; Great Darren Mine; Darren Mine), Pen-bont Rhydybeddau, Trefeirig, Ceredigion, Wales, UK
10.1km (6.3 miles) ⓘGwaith Yr Afon mine (West Cwmsymlog Mine; Cwm Daren Mine; River Mine; Taliesan Mine), Goginan, Trefeirig, Ceredigion, Wales, UK
10.9km (6.8 miles) ⓘLletty Evanhen Mine (Vaughan Mine), Bontgoch, Trefeirig, Ceredigion, Wales, UK
11.2km (6.9 miles) ⓘLlechwedd Helyg Mine (Willow Bank Mine), Pen-bont Rhydybeddau, Trefeirig, Ceredigion, Wales, UK
13.5km (8.4 miles) ⓘCamdwrmawr Mine, Ponterwyd, Trefeirig, Ceredigion, Wales, UK
13.6km (8.5 miles) ⓘBryn-yr-Afr Mine, Ponterwyd, Trefeirig, Ceredigion, 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
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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