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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Marquis Lode, Bedford United Mine, Gulworthy, West Devon, Devon, England, UKi
Regional Level Types
Marquis LodeLode (Abandoned)
Bedford United MineMine
GulworthyCivil Parish
West DevonBorough
DevonCounty
EnglandConstituent Country
UKCountry

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Latitude & Longitude (WGS84):
50° 31' 50'' North , 4° 12' 24'' West
Latitude & Longitude (decimal):
UK National Grid Reference:
SX436725
Type:
Lode (Abandoned) - last checked 2024
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Gunnislake4,044 (2017)0.8km
Calstock790 (2017)3.8km
Lamerton859 (2018)4.7km
Tavistock12,280 (2018)4.9km
Bere Alston2,164 (2018)5.5km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
British Micromount Society, Devon and Cornwall Branch MeetingsLiskeard, Cornwall20km
Mindat Locality ID:
210506
Long-form identifier:
mindat:1:2:210506:5
GUID (UUID V4):
0


This lies about 400m to the north of the New Gunnislake Bridge on the Tavistock side of the Tamar with an adit entrance high up on the hillside.

The east-west lode was worked initially for copper but later for tin and wolfram.

The works are remarkable for once having an underground waterwheel which was possibly up to 40 feet in diameter. The wheel pit is now filled in but the walls of the chamber show slots where supporting timbers were wedged.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

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


Mineral List


8 valid minerals.

Detailed Mineral List:

Brochantite
Formula: Cu4(SO4)(OH)6
Cassiterite
Formula: SnO2
Chalcophyllite
Formula: Cu18Al2(AsO4)4(SO4)3(OH)24 · 36H2O
References:
Paul De Bondt collection.Identification: XRD
Clinoclase
Formula: Cu3(AsO4)(OH)3
References:
Ian Jones collection.Identified by Paul De Bondt: Visual Identification
Cornubite
Formula: Cu5(AsO4)2(OH)4
References:
Ian Jones collection.Identification: XRD
Cornwallite
Formula: Cu5(AsO4)2(OH)4
References:
Ian Jones collection.Identification: XRD
Langite
Formula: Cu4(SO4)(OH)6 · 2H2O
Olivenite
Formula: Cu2(AsO4)(OH)
References:
Ian Jones collection.Identified by Paul De Bondt: Visual Identification

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Cassiterite4.DB.05SnO2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Brochantite7.BB.25Cu4(SO4)(OH)6
Langite7.DD.10Cu4(SO4)(OH)6 · 2H2O
Group 8 - Phosphates, Arsenates and Vanadates
Olivenite8.BB.30Cu2(AsO4)(OH)
Cornwallite8.BD.05Cu5(AsO4)2(OH)4
Cornubite8.BD.30Cu5(AsO4)2(OH)4
Clinoclase8.BE.20Cu3(AsO4)(OH)3
Chalcophyllite8.DF.30Cu18Al2(AsO4)4(SO4)3(OH)24 · 36H2O

List of minerals for each chemical element

HHydrogen
H BrochantiteCu4(SO4)(OH)6
H ChalcophylliteCu18Al2(AsO4)4(SO4)3(OH)24 · 36H2O
H ClinoclaseCu3(AsO4)(OH)3
H CornubiteCu5(AsO4)2(OH)4
H CornwalliteCu5(AsO4)2(OH)4
H LangiteCu4(SO4)(OH)6 · 2H2O
H OliveniteCu2(AsO4)(OH)
OOxygen
O BrochantiteCu4(SO4)(OH)6
O CassiteriteSnO2
O ChalcophylliteCu18Al2(AsO4)4(SO4)3(OH)24 · 36H2O
O ClinoclaseCu3(AsO4)(OH)3
O CornubiteCu5(AsO4)2(OH)4
O CornwalliteCu5(AsO4)2(OH)4
O LangiteCu4(SO4)(OH)6 · 2H2O
O OliveniteCu2(AsO4)(OH)
AlAluminium
Al ChalcophylliteCu18Al2(AsO4)4(SO4)3(OH)24 · 36H2O
SSulfur
S BrochantiteCu4(SO4)(OH)6
S ChalcophylliteCu18Al2(AsO4)4(SO4)3(OH)24 · 36H2O
S LangiteCu4(SO4)(OH)6 · 2H2O
CuCopper
Cu BrochantiteCu4(SO4)(OH)6
Cu ChalcophylliteCu18Al2(AsO4)4(SO4)3(OH)24 · 36H2O
Cu ClinoclaseCu3(AsO4)(OH)3
Cu CornubiteCu5(AsO4)2(OH)4
Cu CornwalliteCu5(AsO4)2(OH)4
Cu LangiteCu4(SO4)(OH)6 · 2H2O
Cu OliveniteCu2(AsO4)(OH)
AsArsenic
As ChalcophylliteCu18Al2(AsO4)4(SO4)3(OH)24 · 36H2O
As ClinoclaseCu3(AsO4)(OH)3
As CornubiteCu5(AsO4)2(OH)4
As CornwalliteCu5(AsO4)2(OH)4
As OliveniteCu2(AsO4)(OH)
SnTin
Sn CassiteriteSnO2

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