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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Devon Great Consols, Gulworthy, West Devon, Devon, England, UKi
Regional Level Types
Devon Great ConsolsGroup of Mines (Abandoned)
GulworthyCivil Parish
West DevonBorough
DevonCounty
EnglandConstituent Country
UKCountry

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Latitude & Longitude (WGS84):
50° North , 4° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~2km
Type:
Group of Mines (Abandoned) - last checked 2018
Köppen climate type:
Mindat Locality ID:
1527
Long-form identifier:
mindat:1:2:1527:4
GUID (UUID V4):
0


Includes the mines of Wheal Maria, Wheal Fanny, Wheal Anna Maria, Wheal Josiah, Wheal Emma, which lie from west to east along the main lode and were the principal sources of firstly copper then arsenic in the latter days. Wheal Frementor, Watson's Mine and Bedford United Mine all lie south of the main lode, Frementor (also called Framator) was mined latterly for tin in the most part and did not finally close until 1930.

Despite earlier attempts the mine did not become a going concern until Josiah Hitchins took up a lease in 1844. The lode was struck just 4 fathoms below the bottom of the previous working in Gard's Shaft at the western end of the sett. Within 6 months and at only 28 fathoms in depth this shaft was 'cutting yellow ore from corner to corner' and in March alone 810 tons of ore was sold.

For the year of 1845 £72,704 profit was divided.
When wheal Fanny was started in 1845 the lode was cut only 3 fathoms below the surface.

In March of 1856 with the lode being worked on its full length from Wh Maria to Wh Emma 3389 tons of ore were sampled, an all time record for Cornwall. The 1856 year total was 28,836 tons. The only limiting factor on output was transport and storage to the quays at Morwellham.
By 1860 the lode at Anna Maria was up to 45 feet wide and yielding up to 80 tons per fathom.

By 1870 refined arsenic was also being produced from arsenopyrite deposits up to 6 feet thick which lined the copper lode and had previously been left in place as having no value. The mine produced over half the British output and only limited output to avoid depressing the world market price.
By 1880 the copper boom was over. Arsenic production sustained the mine for another 20 years until the original company folded in 1901.

The overall output from 1844 to 1902 had been 736,229 tons copper ore sold for £3,473,046 and 72,279 tons refined arsenic for £625,062.
From 'The Mines of East Cornwall and West Devon, D.B. Barton, 1964.

As a means of estimating current worth, miners wages were then 'a few shillings a week'. So even if you multiply the above figures by 100x you still probably have a very low estimate of the value today.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded from this region.


Mineral List

Mineral list contains entries from the region specified including sub-localities

19 valid minerals.

Detailed Mineral List:

Allophane
Formula: (Al2O3)(SiO2)1.3-2 · 2.5-3H2O
Aragonite
Formula: CaCO3
Arsenolite
Formula: As2O3
References:
Arsenopyrite
Formula: FeAsS
Cassiterite
Formula: SnO2
Chalcanthite
Formula: CuSO4 · 5H2O
References:
Paul De Bondt collection.Identification: Visual Identification
Chalcopyrite
Formula: CuFeS2
Childrenite
Formula: Fe2+Al(PO4)(OH)2 · H2O
'Chlorite Group'
Cornubite
Formula: Cu5(AsO4)2(OH)4
Cornwallite
Formula: Cu5(AsO4)2(OH)4
Ferberite
Formula: FeWO4
References:
De Bondt, Paul (n.d.) Personal communication.Identification: Visual Identification
Fluorapatite
Formula: Ca5(PO4)3F
Fluorapatite var. Carbonate-rich Fluorapatite
Formula: Ca5(PO4,CO3)3(F,O)
Fluorite
Formula: CaF2
Gypsum
Formula: CaSO4 · 2H2O
Hematite
Formula: Fe2O3
Pyrite
Formula: FeS2
Quartz
Formula: SiO2
Siderite
Formula: FeCO3
Sphalerite
Formula: ZnS
'Wolframite Group'

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Sphalerite2.CB.05aZnS
Chalcopyrite2.CB.10aCuFeS2
Pyrite2.EB.05aFeS2
Arsenopyrite2.EB.20FeAsS
Group 3 - Halides
Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
Hematite4.CB.05Fe2O3
Arsenolite4.CB.50As2O3
Quartz4.DA.05SiO2
Cassiterite4.DB.05SnO2
Ferberite4.DB.30FeWO4
'Wolframite Group'4.DB.30 va
Group 5 - Nitrates and Carbonates
Siderite5.AB.05FeCO3
Aragonite5.AB.15CaCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Chalcanthite7.CB.20CuSO4 · 5H2O
Gypsum7.CD.40CaSO4 · 2H2O
Group 8 - Phosphates, Arsenates and Vanadates
Cornwallite8.BD.05Cu5(AsO4)2(OH)4
Cornubite8.BD.30Cu5(AsO4)2(OH)4
Fluorapatite
var. Carbonate-rich Fluorapatite
8.BN.05Ca5(PO4,CO3)3(F,O)
8.BN.05Ca5(PO4)3F
Childrenite8.DD.20Fe2+Al(PO4)(OH)2 · H2O
Group 9 - Silicates
Allophane9.ED.20(Al2O3)(SiO2)1.3-2 · 2.5-3H2O
Unclassified
'Chlorite Group'-

List of minerals for each chemical element

HHydrogen
H Allophane(Al2O3)(SiO2)1.3-2 · 2.5-3H2O
H ChalcanthiteCuSO4 · 5H2O
H ChildreniteFe2+Al(PO4)(OH)2 · H2O
H CornubiteCu5(AsO4)2(OH)4
H CornwalliteCu5(AsO4)2(OH)4
H GypsumCaSO4 · 2H2O
CCarbon
C AragoniteCaCO3
C Fluorapatite var. Carbonate-rich FluorapatiteCa5(PO4,CO3)3(F,O)
C SideriteFeCO3
OOxygen
O Allophane(Al2O3)(SiO2)1.3-2 · 2.5-3H2O
O ArsenoliteAs2O3
O AragoniteCaCO3
O Fluorapatite var. Carbonate-rich FluorapatiteCa5(PO4,CO3)3(F,O)
O CassiteriteSnO2
O ChalcanthiteCuSO4 · 5H2O
O ChildreniteFe2+Al(PO4)(OH)2 · H2O
O CornubiteCu5(AsO4)2(OH)4
O CornwalliteCu5(AsO4)2(OH)4
O FerberiteFeWO4
O FluorapatiteCa5(PO4)3F
O GypsumCaSO4 · 2H2O
O HematiteFe2O3
O QuartzSiO2
O SideriteFeCO3
FFluorine
F Fluorapatite var. Carbonate-rich FluorapatiteCa5(PO4,CO3)3(F,O)
F FluorapatiteCa5(PO4)3F
F FluoriteCaF2
AlAluminium
Al Allophane(Al2O3)(SiO2)1.3-2 · 2.5-3H2O
Al ChildreniteFe2+Al(PO4)(OH)2 · H2O
SiSilicon
Si Allophane(Al2O3)(SiO2)1.3-2 · 2.5-3H2O
Si QuartzSiO2
PPhosphorus
P Fluorapatite var. Carbonate-rich FluorapatiteCa5(PO4,CO3)3(F,O)
P ChildreniteFe2+Al(PO4)(OH)2 · H2O
P FluorapatiteCa5(PO4)3F
SSulfur
S ArsenopyriteFeAsS
S ChalcopyriteCuFeS2
S ChalcanthiteCuSO4 · 5H2O
S GypsumCaSO4 · 2H2O
S PyriteFeS2
S SphaleriteZnS
CaCalcium
Ca AragoniteCaCO3
Ca Fluorapatite var. Carbonate-rich FluorapatiteCa5(PO4,CO3)3(F,O)
Ca FluorapatiteCa5(PO4)3F
Ca FluoriteCaF2
Ca GypsumCaSO4 · 2H2O
FeIron
Fe ArsenopyriteFeAsS
Fe ChalcopyriteCuFeS2
Fe ChildreniteFe2+Al(PO4)(OH)2 · H2O
Fe FerberiteFeWO4
Fe HematiteFe2O3
Fe PyriteFeS2
Fe SideriteFeCO3
CuCopper
Cu ChalcopyriteCuFeS2
Cu ChalcanthiteCuSO4 · 5H2O
Cu CornubiteCu5(AsO4)2(OH)4
Cu CornwalliteCu5(AsO4)2(OH)4
ZnZinc
Zn SphaleriteZnS
AsArsenic
As ArsenoliteAs2O3
As ArsenopyriteFeAsS
As CornubiteCu5(AsO4)2(OH)4
As CornwalliteCu5(AsO4)2(OH)4
SnTin
Sn CassiteriteSnO2
WTungsten
W FerberiteFeWO4

Localities in this Region

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