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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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Rhiwsaeson (Gwern Efa), Llantrisant, Rhondda Cynon Taf, Wales, UKi
Regional Level Types
Rhiwsaeson (Gwern Efa)- not defined -
Llantrisant- not defined -
Rhondda Cynon TafCounty Borough
WalesCountry
UKCountry

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Latitude & Longitude (WGS84):
51° 31' 52'' North , 3° 21' 3'' West
Latitude & Longitude (decimal):
UK National Grid Reference:
ST063823
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Llantrisant14,422 (2017)1.9km
Beddau8,134 (2011)2.6km
Llantwit Fardre3,992 (2011)2.9km
Pontyclun5,794 (2012)3.0km
Pentyrch2,287 (2017)3.9km
Mindat Locality ID:
4860
Long-form identifier:
mindat:1:2:4860:9
GUID (UUID V4):
0
Other/historical names associated with this locality:
Mid Glamorgan; Glamorgan


Small, old mine dumps in woodland around Gwern Efa, one mile south-east of Llantrisant, and where North (1916) noted a shaft sunk in search of lead. Often referred to as Rhiwsaeson (mine) by collectors after the nearby hamlet of Rhiwsaeson.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


9 valid minerals.

Detailed Mineral List:

Alstonite
Formula: BaCa(CO3)2
Description: The alstonite is pseudomorphed by barite
References:
Aragonite
Formula: CaCO3
Baryte
Formula: BaSO4
Barytocalcite ?
Formula: BaCa(CO3)2
Calcite
Formula: CaCO3
Galena
Formula: PbS
Pyrite
Formula: FeS2
Sphalerite
Formula: ZnS
Witherite
Formula: BaCO3

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Sphalerite2.CB.05aZnS
Galena2.CD.10PbS
Pyrite2.EB.05aFeS2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Aragonite5.AB.15CaCO3
Witherite5.AB.15BaCO3
Alstonite5.AB.35BaCa(CO3)2
Barytocalcite ?5.AB.45BaCa(CO3)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Baryte7.AD.35BaSO4

List of minerals for each chemical element

CCarbon
C AlstoniteBaCa(CO3)2
C AragoniteCaCO3
C BarytocalciteBaCa(CO3)2
C CalciteCaCO3
C WitheriteBaCO3
OOxygen
O AlstoniteBaCa(CO3)2
O AragoniteCaCO3
O BarytocalciteBaCa(CO3)2
O BaryteBaSO4
O CalciteCaCO3
O WitheriteBaCO3
SSulfur
S BaryteBaSO4
S GalenaPbS
S PyriteFeS2
S SphaleriteZnS
CaCalcium
Ca AlstoniteBaCa(CO3)2
Ca AragoniteCaCO3
Ca BarytocalciteBaCa(CO3)2
Ca CalciteCaCO3
FeIron
Fe PyriteFeS2
ZnZinc
Zn SphaleriteZnS
BaBarium
Ba AlstoniteBaCa(CO3)2
Ba BarytocalciteBaCa(CO3)2
Ba BaryteBaSO4
Ba WitheriteBaCO3
PbLead
Pb GalenaPbS

Other Regions, Features and Areas containing this locality

British and Irish IslesGroup of Islands
Eurasian PlateTectonic Plate
EuropeContinent
UK

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