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Bwlch Glas Mine, Talybont, Ceulanymaesmawr, Ceredigion, Wales, UKi
Regional Level Types
Bwlch Glas MineMine (Abandoned)
Talybont- not defined -
Ceulanymaesmawr- not defined -
CeredigionCounty
WalesCountry
UKCountry

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Key
Latitude & Longitude (WGS84):
52° 28' 20'' North , 3° 54' 3'' West
Latitude & Longitude (decimal):
UK National Grid Reference:
SN709878
Locality type:
Mine (Abandoned) - last checked 2019
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Capel Bangor256 (2017)9.0km
Bow Street1,572 (2017)9.2km
Borth1,269 (2017)10.3km
Aberdyfi725 (2017)12.6km
Machynlleth2,235 (2017)13.6km
Other/historical names associated with this locality:
Dyfed; Cardiganshire


The mine is probably best known for its occurrence of pyromorphite, from a vertical pipe in the roof of the adit (pyromorphite is also found in other areas in this adit level). The mine was developed on two veins possibly associated with the Hafan fault. Recorded working at the mine is very late in relationship to other mines in mid-Wales. And was being worked on a number of occasions from 1882 to 1916, producing 1240 tons of lead ore and 99 tons of zinc ore.


Select Mineral List Type

Standard Detailed Gallery Strunz Dana Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


19 valid minerals.

Detailed Mineral List:

Anglesite
Formula: PbSO4
Habit: Bladed, and blocky
Colour: Colourless
Description: Colourless xls to 1mm with cerussite, susannite, caledonite, and malachite
Reference: Braithwaite, R.S.W. (1982): Pyromorphite, wulfenite and other minerals from the Bwlch-Glas mine central Wales. Mineralogical Record 13: 151-153
'Bindheimite'
Formula: Pb2Sb2O6O
Habit: Massive, powdery
Colour: Shades of yellow
Reference: No reference listed
Caledonite
Formula: Pb5Cu2(SO4)3(CO3)(OH)6
Habit: Prismatic
Colour: Blue
Description: Light blue xls to 0.5mm with cerussite, susannite.
Reference: [UKJMM 17 (1996) p.18]
Cerussite
Formula: PbCO3
Habit: Various
Colour: Colourless, white, creamy
Description: Colourless to creamy xls to 1cm+.
Reference: Braithwaite, R.S.W. (1982): Pyromorphite, wulfenite and other minerals from the Bwlch-Glas mine central Wales. Mineralogical Record 13: 151-153
Chalcopyrite
Formula: CuFeS2
Habit: Massive
Reference: [UKJMM 17 (1996) p.18]
Chenite ?
Formula: Pb4Cu(SO4)2(OH)6
Description: Unconfirmed from this mine. The crystal form, colour and association would be correct for this species
Reference: S Rust
Cinnabar
Formula: HgS
Habit: Powdery
Colour: Red, orange red
Reference: Braithwaite, R.S.W. (1982): Pyromorphite, wulfenite and other minerals from the Bwlch-Glas mine central Wales. Mineralogical Record 13: 151-153
Galena
Formula: PbS
Habit: Massive
Reference: [UKJMM 17 (1996) p.18]
Greenockite
Formula: CdS
Habit: Very thin crusts
Colour: Yellow, bright yellow
Reference: Braithwaite, R.S.W. (1982): Pyromorphite, wulfenite and other minerals from the Bwlch-Glas mine central Wales. Mineralogical Record 13: 151-153
Hemimorphite
Formula: Zn4Si2O7(OH)2 · H2O
Habit: Bladed crystals
Colour: Colourless
Reference: Braithwaite, R.S.W. (1982): Pyromorphite, wulfenite and other minerals from the Bwlch-Glas mine central Wales. Mineralogical Record 13: 151-153
Hydrozincite
Formula: Zn5(CO3)2(OH)6
Reference: national museum of wales database
Malachite
Formula: Cu2(CO3)(OH)2
Habit: Botryoidal
Colour: Pale green, green
Reference: [UKJMM 17 (1996) p.18]
Mattheddleite
Formula: Pb5(SiO4)1.5(SO4)1.5(Cl,OH)
Reference: S.Rust collection
Pyromorphite
Formula: Pb5(PO4)3Cl
Habit: Prismatic, drusey.
Colour: Shades of green, yellow to pale orange
Description: Mostly grass green xls to 5mm, forming drusy crusts to several cms. Has been found as yellow to yellow-orange micro-crystals. Associated with cerussite, and wulfenite.
Reference: Braithwaite, R.S.W. (1982): Pyromorphite, wulfenite and other minerals from the Bwlch-Glas mine central Wales. Mineralogical Record 13: 151-153
Quartz
Formula: SiO2
Habit: Massive, typical crystal habits
Colour: White-colourless
Reference: [UKJMM 17 (1996) p.18]
Sphalerite
Formula: ZnS
Habit: Massive
Colour: Brown
Reference: [UKJMM 17 (1996) p.18]
Steverustite
Formula: Pb2+5(OH)5[Cu+(S6+O3S2-)3](H2O)2
Reference: Cooper, M.A., Hawthorne, F.C., Moffatt, E. (2009): Steverustite, Pb2+5(OH)5(Cu1+(S6+O3S2-)3)H2O)2, a new thiosulphate mineral from the Frongoch Mine Dump, Devils Bridge, Ceredigion, Wales: Description and crystal structure. Mineralogical Magazine, 73, 235-250; S. Rust Collection
Susannite
Formula: Pb4(CO3)2(SO4)(OH)2
Habit: Platy pseudohexagonal
Colour: Colourless-creamy
Description: Colourless pseudohexagonal xls to 0.5mm, with cerussite, anglesite, and caledonite.
Reference: [UKJMM 17 (1996) p.18]
Ullmannite
Formula: NiSbS
Wulfenite
Formula: Pb(MoO4)
Habit: Bipyramiddle, tabular, blocky
Colour: Orange, yellow-orange
Description: Orange to yellow-orange bipyramiddle and tabular xls to 1mm. With pyromorphite, and cerussite
Reference: [MinRec 13:151-153, 21:492]

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Chalcopyrite2.CB.10aCuFeS2
Cinnabar2.CD.15aHgS
Galena2.CD.10PbS
Greenockite2.CB.45CdS
Sphalerite2.CB.05aZnS
Ullmannite2.EB.25NiSbS
Group 4 - Oxides and Hydroxides
'Bindheimite'4.DH.20Pb2Sb2O6O
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Cerussite5.AB.15PbCO3
Hydrozincite5.BA.15Zn5(CO3)2(OH)6
Malachite5.BA.10Cu2(CO3)(OH)2
Susannite5.BF.40Pb4(CO3)2(SO4)(OH)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Anglesite7.AD.35PbSO4
Caledonite7.BC.50Pb5Cu2(SO4)3(CO3)(OH)6
Chenite ?7.BC.70Pb4Cu(SO4)2(OH)6
Steverustite7.JA.10Pb2+5(OH)5[Cu+(S6+O3S2-)3](H2O)2
Wulfenite7.GA.05Pb(MoO4)
Group 8 - Phosphates, Arsenates and Vanadates
Pyromorphite8.BN.05Pb5(PO4)3Cl
Group 9 - Silicates
Hemimorphite9.BD.10Zn4Si2O7(OH)2 · H2O
Mattheddleite9.AH.25Pb5(SiO4)1.5(SO4)1.5(Cl,OH)

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Cinnabar2.8.14.1HgS
Galena2.8.1.1PbS
Greenockite2.8.7.2CdS
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Ullmannite2.12.3.3NiSbS
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Cerussite14.1.3.4PbCO3
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Malachite16a.3.1.1Cu2(CO3)(OH)2
Hydrozincite16a.4.1.1Zn5(CO3)2(OH)6
Group 17 - COMPOUND CARBONATES
Miscellaneous
Susannite17.1.3.1Pb4(CO3)2(SO4)(OH)2
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Anglesite28.3.1.3PbSO4
Group 30 - ANHYDROUS SULFATES CONTAINING HYDROXYL OR HALOGEN
(AB)m(XO4)pZq, where m:p>2:1
Chenite ?30.1.16.1Pb4Cu(SO4)2(OH)6
Miscellaneous
Steverustite30.4.4.Pb2+5(OH)5[Cu+(S6+O3S2-)3](H2O)2
Group 32 - COMPOUND SULFATES
Anhydrous Compound Sulfates containing Hydroxyl or Halogen
Caledonite32.3.2.1Pb5Cu2(SO4)3(CO3)(OH)6
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A5(XO4)3Zq
Pyromorphite41.8.4.1Pb5(PO4)3Cl
Group 44 - ANTIMONATES
A2X2O6(O,OH,F)
'Bindheimite'44.1.1.2Pb2Sb2O6O
Group 48 - ANHYDROUS MOLYBDATES AND TUNGSTATES
AXO4
Wulfenite48.1.3.1Pb(MoO4)
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
Mattheddleite52.4.9.6Pb5(SiO4)1.5(SO4)1.5(Cl,OH)
Group 56 - SOROSILICATES Si2O7 Groups, With Additional O, OH, F and H2O
Si2O7 Groups and O, OH, F, and H2O with cations in [4] coordination
Hemimorphite56.1.2.1Zn4Si2O7(OH)2 · H2O
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2

List of minerals for each chemical element

HHydrogen
H SusannitePb4(CO3)2(SO4)(OH)2
H SteverustitePb52+(OH)5[Cu+(S6+O3S2-)3](H2O)2
H MattheddleitePb5(SiO4)1.5(SO4)1.5(Cl,OH)
H HydrozinciteZn5(CO3)2(OH)6
H HemimorphiteZn4Si2O7(OH)2 · H2O
H CaledonitePb5Cu2(SO4)3(CO3)(OH)6
H MalachiteCu2(CO3)(OH)2
H ChenitePb4Cu(SO4)2(OH)6
CCarbon
C CerussitePbCO3
C SusannitePb4(CO3)2(SO4)(OH)2
C HydrozinciteZn5(CO3)2(OH)6
C CaledonitePb5Cu2(SO4)3(CO3)(OH)6
C MalachiteCu2(CO3)(OH)2
OOxygen
O PyromorphitePb5(PO4)3Cl
O WulfenitePb(MoO4)
O AnglesitePbSO4
O CerussitePbCO3
O SusannitePb4(CO3)2(SO4)(OH)2
O SteverustitePb52+(OH)5[Cu+(S6+O3S2-)3](H2O)2
O MattheddleitePb5(SiO4)1.5(SO4)1.5(Cl,OH)
O HydrozinciteZn5(CO3)2(OH)6
O BindheimitePb2Sb2O6O
O HemimorphiteZn4Si2O7(OH)2 · H2O
O CaledonitePb5Cu2(SO4)3(CO3)(OH)6
O QuartzSiO2
O MalachiteCu2(CO3)(OH)2
O ChenitePb4Cu(SO4)2(OH)6
SiSilicon
Si MattheddleitePb5(SiO4)1.5(SO4)1.5(Cl,OH)
Si HemimorphiteZn4Si2O7(OH)2 · H2O
Si QuartzSiO2
PPhosphorus
P PyromorphitePb5(PO4)3Cl
SSulfur
S AnglesitePbSO4
S SusannitePb4(CO3)2(SO4)(OH)2
S SteverustitePb52+(OH)5[Cu+(S6+O3S2-)3](H2O)2
S UllmanniteNiSbS
S MattheddleitePb5(SiO4)1.5(SO4)1.5(Cl,OH)
S CinnabarHgS
S GreenockiteCdS
S CaledonitePb5Cu2(SO4)3(CO3)(OH)6
S SphaleriteZnS
S GalenaPbS
S ChalcopyriteCuFeS2
S ChenitePb4Cu(SO4)2(OH)6
ClChlorine
Cl PyromorphitePb5(PO4)3Cl
Cl MattheddleitePb5(SiO4)1.5(SO4)1.5(Cl,OH)
FeIron
Fe ChalcopyriteCuFeS2
NiNickel
Ni UllmanniteNiSbS
CuCopper
Cu SteverustitePb52+(OH)5[Cu+(S6+O3S2-)3](H2O)2
Cu CaledonitePb5Cu2(SO4)3(CO3)(OH)6
Cu MalachiteCu2(CO3)(OH)2
Cu ChalcopyriteCuFeS2
Cu ChenitePb4Cu(SO4)2(OH)6
ZnZinc
Zn HydrozinciteZn5(CO3)2(OH)6
Zn HemimorphiteZn4Si2O7(OH)2 · H2O
Zn SphaleriteZnS
MoMolybdenum
Mo WulfenitePb(MoO4)
CdCadmium
Cd GreenockiteCdS
SbAntimony
Sb UllmanniteNiSbS
Sb BindheimitePb2Sb2O6O
HgMercury
Hg CinnabarHgS
PbLead
Pb PyromorphitePb5(PO4)3Cl
Pb WulfenitePb(MoO4)
Pb AnglesitePbSO4
Pb CerussitePbCO3
Pb SusannitePb4(CO3)2(SO4)(OH)2
Pb SteverustitePb52+(OH)5[Cu+(S6+O3S2-)3](H2O)2
Pb MattheddleitePb5(SiO4)1.5(SO4)1.5(Cl,OH)
Pb BindheimitePb2Sb2O6O
Pb CaledonitePb5Cu2(SO4)3(CO3)(OH)6
Pb GalenaPbS
Pb ChenitePb4Cu(SO4)2(OH)6

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Braithwaite, R.S.W. (1982): Pyromorphite, wulfenite and other minerals from the Bwlch-Glas mine central Wales. Mineralogical Record 13: 151-153

Other Regions, Features and Areas containing this locality

British 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.
 
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