Log InRegister
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreOur ScienceMindat Newsletter [Free Download]Contact Us
Donate to MindatSponsor a PageCorporate SponsorshipSponsored Pages
Learning CenterWhat Is a Mineral?The Most Common Minerals on EarthInformation for EducatorsMindat ArticlesMindat Newsletter [Free Download]The ElementsThe Mineral Quiz
Search FormMinerals by PropertiesMinerals by ChemistryMineral Visual ExplorerAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDMinerals by CountryAlphabetical Mineral IndexAlphabetical Locality SearchMineral Association SearchList of CountriesLocalities Near MePhoto SearchSearch ArticlesSearch GlossaryThe Rock H. Currier Digital LibraryMore Search Options
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
MineralsPetrologyFossilsMeteoritesGeologic Time
Mining CompaniesStatisticsMineral MuseumsClubs & OrganizationsMineral Shows & EventsDevice SettingsTime Machine
Read DiscussionsIdentification Request
Photo SearchPhoto GalleriesSearch by ColourPhoto Colour ExplorerNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Trial level, Vigra Mine, Llanelltyd, Gwynedd, Wales, UKi
Regional Level Types
Trial levelLevel
Vigra MineMine (Inactive)
LlanelltydCommunity
GwyneddCounty
WalesCountry
UKCountry

This page is currently not sponsored. Click here to sponsor this page.
PhotosMapsSearch
Latitude & Longitude (WGS84):
52° 45' 18'' North , 3° 59' 24'' West
Latitude & Longitude (decimal):
UK National Grid Reference:
SH657194
Type:
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Dyffryn Ardudwy1,654 (2012)5.6km
Barmouth2,315 (2017)5.7km
Dolgellau2,688 (2017)7.2km
Tal-y-bont1,540 (2017)7.2km
Fairbourne721 (2017)7.9km
Mindat Locality ID:
4756
Long-form identifier:
mindat:1:2:4756:5
GUID (UUID V4):
0
Other/historical names associated with this locality:
Merionethshire


A trial adit, only 30-40m in length, above small dumps on the hillside, in the general area of the Vigra Mine set. There appears to be no record of when the adit was driven.

The adit intersects a vein on it's footwall after 20m. There is no stoping.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


23 valid minerals.

Detailed Mineral List:

ⓘ Aragonite
Formula: CaCO3
ⓘ Arsenopyrite
Formula: FeAsS
ⓘ Brochantite
Formula: Cu4(SO4)(OH)6
ⓘ Chalcoalumite
Formula: CuAl4(SO4)(OH)12 · 3H2O
ⓘ Chalcocite
Formula: Cu2S
ⓘ Chalcophyllite
Formula: Cu18Al2(AsO4)4(SO4)3(OH)24 · 36H2O
ⓘ 'Chlorite Group'
ⓘ Chrysocolla
Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
ⓘ Cobaltite
Formula: CoAsS
ⓘ Covellite
Formula: CuS
ⓘ Cuprite
Formula: Cu2O
ⓘ Devilline
Formula: CaCu4(SO4)2(OH)6 · 3H2O
ⓘ Erythrite
Formula: Co3(AsO4)2 · 8H2O
ⓘ Gypsum
Formula: CaSO4 · 2H2O
ⓘ Langite
Formula: Cu4(SO4)(OH)6 · 2H2O
ⓘ Malachite
Formula: Cu2(CO3)(OH)2
ⓘ 'Mica Group'
ⓘ Monohydrocalcite
Formula: CaCO3 · H2O
ⓘ Native Copper
Formula: Cu
ⓘ Pyrite
Formula: FeS2
ⓘ Pyrrhotite
Formula: Fe1-xS
ⓘ Quartz
Formula: SiO2
ⓘ Sphalerite
Formula: ZnS
ⓘ Tyrolite
Formula: Ca2Cu9(AsO4)4(CO3)(OH)8 · 11H2O
ⓘ Wroewolfeite
Formula: Cu4(SO4)(OH)6 · 2H2O

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘNative Copper1.AA.05Cu
Group 2 - Sulphides and Sulfosalts
ⓘChalcocite2.BA.05Cu2S
ⓘCovellite2.CA.05aCuS
ⓘSphalerite2.CB.05aZnS
ⓘPyrrhotite2.CC.10Fe1-xS
ⓘPyrite2.EB.05aFeS2
ⓘArsenopyrite2.EB.20FeAsS
ⓘCobaltite2.EB.25CoAsS
Group 4 - Oxides and Hydroxides
ⓘCuprite4.AA.10Cu2O
ⓘQuartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
ⓘAragonite5.AB.15CaCO3
ⓘMalachite5.BA.10Cu2(CO3)(OH)2
ⓘMonohydrocalcite5.CB.20CaCO3 · H2O
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘBrochantite7.BB.25Cu4(SO4)(OH)6
ⓘGypsum7.CD.40CaSO4 · 2H2O
ⓘLangite7.DD.10Cu4(SO4)(OH)6 · 2H2O
ⓘWroewolfeite7.DD.10Cu4(SO4)(OH)6 · 2H2O
ⓘDevilline7.DD.30CaCu4(SO4)2(OH)6 · 3H2O
ⓘChalcoalumite7.DD.75CuAl4(SO4)(OH)12 · 3H2O
Group 8 - Phosphates, Arsenates and Vanadates
ⓘErythrite8.CE.40Co3(AsO4)2 · 8H2O
ⓘChalcophyllite8.DF.30Cu18Al2(AsO4)4(SO4)3(OH)24 · 36H2O
ⓘTyrolite8.DM.10Ca2Cu9(AsO4)4(CO3)(OH)8 · 11H2O
Group 9 - Silicates
ⓘChrysocolla9.ED.20Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Unclassified
ⓘ'Chlorite Group'-
ⓘ'Mica Group'-

List of minerals for each chemical element

HHydrogen
Hⓘ BrochantiteCu4(SO4)(OH)6
Hⓘ ChalcoalumiteCuAl4(SO4)(OH)12 · 3H2O
Hⓘ ChalcophylliteCu18Al2(AsO4)4(SO4)3(OH)24 · 36H2O
Hⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Hⓘ DevillineCaCu4(SO4)2(OH)6 · 3H2O
Hⓘ ErythriteCo3(AsO4)2 · 8H2O
Hⓘ GypsumCaSO4 · 2H2O
Hⓘ LangiteCu4(SO4)(OH)6 · 2H2O
Hⓘ MalachiteCu2(CO3)(OH)2
Hⓘ MonohydrocalciteCaCO3 · H2O
Hⓘ TyroliteCa2Cu9(AsO4)4(CO3)(OH)8 · 11H2O
Hⓘ WroewolfeiteCu4(SO4)(OH)6 · 2H2O
CCarbon
Cⓘ AragoniteCaCO3
Cⓘ MalachiteCu2(CO3)(OH)2
Cⓘ MonohydrocalciteCaCO3 · H2O
Cⓘ TyroliteCa2Cu9(AsO4)4(CO3)(OH)8 · 11H2O
OOxygen
Oⓘ AragoniteCaCO3
Oⓘ BrochantiteCu4(SO4)(OH)6
Oⓘ ChalcoalumiteCuAl4(SO4)(OH)12 · 3H2O
Oⓘ ChalcophylliteCu18Al2(AsO4)4(SO4)3(OH)24 · 36H2O
Oⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Oⓘ CupriteCu2O
Oⓘ DevillineCaCu4(SO4)2(OH)6 · 3H2O
Oⓘ ErythriteCo3(AsO4)2 · 8H2O
Oⓘ GypsumCaSO4 · 2H2O
Oⓘ LangiteCu4(SO4)(OH)6 · 2H2O
Oⓘ MalachiteCu2(CO3)(OH)2
Oⓘ MonohydrocalciteCaCO3 · H2O
Oⓘ QuartzSiO2
Oⓘ TyroliteCa2Cu9(AsO4)4(CO3)(OH)8 · 11H2O
Oⓘ WroewolfeiteCu4(SO4)(OH)6 · 2H2O
AlAluminium
Alⓘ ChalcoalumiteCuAl4(SO4)(OH)12 · 3H2O
Alⓘ ChalcophylliteCu18Al2(AsO4)4(SO4)3(OH)24 · 36H2O
Alⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
SiSilicon
Siⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Siⓘ QuartzSiO2
SSulfur
Sⓘ ArsenopyriteFeAsS
Sⓘ BrochantiteCu4(SO4)(OH)6
Sⓘ ChalcoalumiteCuAl4(SO4)(OH)12 · 3H2O
Sⓘ ChalcociteCu2S
Sⓘ ChalcophylliteCu18Al2(AsO4)4(SO4)3(OH)24 · 36H2O
Sⓘ CobaltiteCoAsS
Sⓘ CovelliteCuS
Sⓘ DevillineCaCu4(SO4)2(OH)6 · 3H2O
Sⓘ GypsumCaSO4 · 2H2O
Sⓘ LangiteCu4(SO4)(OH)6 · 2H2O
Sⓘ PyriteFeS2
Sⓘ PyrrhotiteFe1-xS
Sⓘ SphaleriteZnS
Sⓘ WroewolfeiteCu4(SO4)(OH)6 · 2H2O
CaCalcium
Caⓘ AragoniteCaCO3
Caⓘ DevillineCaCu4(SO4)2(OH)6 · 3H2O
Caⓘ GypsumCaSO4 · 2H2O
Caⓘ MonohydrocalciteCaCO3 · H2O
Caⓘ TyroliteCa2Cu9(AsO4)4(CO3)(OH)8 · 11H2O
FeIron
Feⓘ ArsenopyriteFeAsS
Feⓘ PyriteFeS2
Feⓘ PyrrhotiteFe1-xS
CoCobalt
Coⓘ CobaltiteCoAsS
Coⓘ ErythriteCo3(AsO4)2 · 8H2O
CuCopper
Cuⓘ BrochantiteCu4(SO4)(OH)6
Cuⓘ ChalcoalumiteCuAl4(SO4)(OH)12 · 3H2O
Cuⓘ ChalcociteCu2S
Cuⓘ ChalcophylliteCu18Al2(AsO4)4(SO4)3(OH)24 · 36H2O
Cuⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Cuⓘ CovelliteCuS
Cuⓘ CupriteCu2O
Cuⓘ Native CopperCu
Cuⓘ DevillineCaCu4(SO4)2(OH)6 · 3H2O
Cuⓘ LangiteCu4(SO4)(OH)6 · 2H2O
Cuⓘ MalachiteCu2(CO3)(OH)2
Cuⓘ TyroliteCa2Cu9(AsO4)4(CO3)(OH)8 · 11H2O
Cuⓘ WroewolfeiteCu4(SO4)(OH)6 · 2H2O
ZnZinc
Znⓘ SphaleriteZnS
AsArsenic
Asⓘ ArsenopyriteFeAsS
Asⓘ ChalcophylliteCu18Al2(AsO4)4(SO4)3(OH)24 · 36H2O
Asⓘ CobaltiteCoAsS
Asⓘ ErythriteCo3(AsO4)2 · 8H2O
Asⓘ TyroliteCa2Cu9(AsO4)4(CO3)(OH)8 · 11H2O

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.
 
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: October 21, 2026 09:06:12 Page updated: November 24, 2025 13:22:25
Go to top of page