Vote for your favorite mineral in #MinCup26! - Bournonite vs. Vesuvianite
Cogwheels of bournonite are up against colourful vesuvianite.
Log InRegister
Quick Links : The Mindat ManualThe Rock H. Currier Digital LibraryMindat Newsletter [Free Download]
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsThe Rock H. Currier Digital LibraryGeologic TimeExplore Fossils
Minerals by PropertiesMinerals by ChemistryMineral Visual ExplorerAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsClubs & OrganizationsMineral Shows & EventsThe Mindat DirectoryDevice SettingsThe Mineral QuizTime Machine
Photo SearchPhoto GalleriesSearch by ColorPhoto Colour ExplorerNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Caegwernog Mine, Llanelltyd, Gwynedd, Wales, UKi
Regional Level Types
Caegwernog MineMine
LlanelltydCommunity
GwyneddCounty
WalesCountry
UKCountry

This page is currently not sponsored. Click here to sponsor this page.
PhotosMapsSearch
Latitude & Longitude (WGS84):
52° 46' 57'' North , 3° 54' 30'' West
Latitude & Longitude (decimal):
52.78258,-3.90844
GeoHash:
G#: gcmhr0cby
GRN:
N36W02
UK National Grid Reference:
SH713223
Type:
Mine
Köppen climate type:
Cfb : Temperate oceanic climate
Nearest Settlements:
PlacePopulationDistance
Dolgellau2,688 (2017)4.7km
Dyffryn Ardudwy1,654 (2012)10.5km
Barmouth2,315 (2017)12.0km
Tal-y-bont1,540 (2017)12.4km
Trawsfynydd628 (2017)13.3km
Mindat Locality ID:
55675
Long-form identifier:
mindat:1:2:55675:1
GUID (UUID V4):
0
Other/historical names associated with this locality:
Merionethshire


Caegwernog worked a number of well-mineralised lodes of short strike running through the Clogau Shales at the head of the Wrin valley, and carrying galena, sphalerite, pyrite and arsenopyrite.

First opened in 1842-43, three adits have been driven, two as early as 1846, together with a shaft and various trials. Caegwernog worked imtermittently till 1905, the last owners being the St David's Mining Development Company Ltd.

The only recorded output is in 1874, when 19 tons of zinc ore was produced.

refs:
Goldmining in Western Merioneth, T. A. Morrison (undated)
The Gold Mines of Merioneth, G.W. Hall (undated)

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


4 valid minerals.

Detailed Mineral List:

ⓘ Arsenopyrite
Formula: FeAsS
ⓘ Galena
Formula: PbS
ⓘ Pyrite
Formula: FeS2
ⓘ Sphalerite
Formula: ZnS

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘSphalerite2.CB.05aZnS
ⓘGalena2.CD.10PbS
ⓘPyrite2.EB.05aFeS2
ⓘArsenopyrite2.EB.20FeAsS

List of minerals for each chemical element

SSulfur
Sⓘ ArsenopyriteFeAsS
Sⓘ GalenaPbS
Sⓘ PyriteFeS2
Sⓘ SphaleriteZnS
FeIron
Feⓘ ArsenopyriteFeAsS
Feⓘ PyriteFeS2
ZnZinc
Znⓘ SphaleriteZnS
AsArsenic
Asⓘ ArsenopyriteFeAsS
PbLead
Pbⓘ GalenaPbS

Other Regions, Features and Areas containing this locality

British and Irish IslesGroup of Islands
Eurasian PlateTectonic Plate
EuropeContinent
UK

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.
Quick NavTopMineral ListOther Regions
 
and/or  
Mindat.org® is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Mindat® and mindat.org® are registered trademarks of the Hudson Institute of Mineralogy.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2026, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph and Ida Chau.
Content on this site may not be used to train, fine-tune, or otherwise develop artificial intelligence or machine learning models without prior written permission - see our Terms & Conditions.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: September 4, 2026 07:28:27 Page updated: August 16, 2025 12:36:15
Go to top of page