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Cobra pit, Gravelotte Emerald Mine, Gravelotte, Murchison Range, Ba-Phalaborwa Local Municipality, Mopani District Municipality, Limpopo, South Africai
Regional Level Types
Cobra pitPit
Gravelotte Emerald MineMine
Gravelotte- not defined -
Murchison RangeMountain Range
Ba-Phalaborwa Local MunicipalityMunicipality
Mopani District MunicipalityMunicipality
LimpopoProvince
South AfricaCountry

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PhotosMapsSearchMineralogy
02135030017272036122805.jpg
Emerald

Cobra pit, Gravelotte Emerald Mine, Gravelotte, Murchison Range, Ba-Phalaborwa Local Municipality, Mopani District Municipality, Limpopo, South Africa
04136380017272056641441.jpg
Emerald

Cobra pit, Gravelotte Emerald Mine, Gravelotte, Murchison Range, Ba-Phalaborwa Local Municipality, Mopani District Municipality, Limpopo, South Africa
09221480017272036126392.jpg
Emerald

Cobra pit, Gravelotte Emerald Mine, Gravelotte, Murchison Range, Ba-Phalaborwa Local Municipality, Mopani District Municipality, Limpopo, South Africa
07766930017272036109192.jpg
Emerald

Cobra pit, Gravelotte Emerald Mine, Gravelotte, Murchison Range, Ba-Phalaborwa Local Municipality, Mopani District Municipality, Limpopo, South Africa
08050780017272036072718.jpg
Emerald

Cobra pit, Gravelotte Emerald Mine, Gravelotte, Murchison Range, Ba-Phalaborwa Local Municipality, Mopani District Municipality, Limpopo, South Africa
04136380017272056641441.jpg
Emerald

Cobra pit, Gravelotte Emerald Mine, Gravelotte, Murchison Range, Ba-Phalaborwa Local Municipality, Mopani District Municipality, Limpopo, South Africa
07838520017272036086847.jpg
Emerald

Cobra pit, Gravelotte Emerald Mine, Gravelotte, Murchison Range, Ba-Phalaborwa Local Municipality, Mopani District Municipality, Limpopo, South Africa
07766930017272036109192.jpg
Emerald

Cobra pit, Gravelotte Emerald Mine, Gravelotte, Murchison Range, Ba-Phalaborwa Local Municipality, Mopani District Municipality, Limpopo, South Africa
02135030017272036122805.jpg
Emerald

Cobra pit, Gravelotte Emerald Mine, Gravelotte, Murchison Range, Ba-Phalaborwa Local Municipality, Mopani District Municipality, Limpopo, South Africa
00440200017272080513907.jpg
Emerald

Cobra pit, Gravelotte Emerald Mine, Gravelotte, Murchison Range, Ba-Phalaborwa Local Municipality, Mopani District Municipality, Limpopo, South Africa
Latitude & Longitude (WGS84):
23° 58' 0'' South , 30° 38' 25'' East
Latitude & Longitude (decimal):
-23.96669,30.64032
GRN:
S16E20
Type:
Pit
Köppen climate type:
BSh : Hot semi-arid (steppe) climate
Nearest Settlements:
PlacePopulationDistance
Nkowakowa30,138 (2014)36.9km
Tzaneen16,954 (2013)50.7km
Ga-Kgapane13,000 (2013)55.6km
Mindat Locality ID:
54196
Long-form identifier:
mindat:1:2:54196:2
GUID (UUID V4):
0


Main emerald workings.
An emerald pit.

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


12 valid minerals.

Rock Types Recorded


Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ Actinolite
Formula: ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
ⓘ 'Apatite'
Formula: Ca5(PO4)3A
✪ Beryl
Formula: Be3Al2(Si6O18)
✪ Beryl var. Emerald
Formula: Be3Al2(Si6O18)
ⓘ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ Chalcopyrite
Formula: CuFeS2
ⓘ 'Chlorite Group'
ⓘ 'Feldspar Group'
ⓘ Molybdenite
Formula: MoS2
ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Native Bismuth
Formula: Bi
ⓘ Phenakite
Formula: Be2SiO4
ⓘ 'Plagioclase'
Formula: (Na,Ca)[(Si,Al)AlSi2]O8
ⓘ Pyrite
Formula: FeS2
ⓘ Quartz
Formula: SiO2
ⓘ Scheelite
Formula: Ca(WO4)
ⓘ Schorl
Formula: NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
ⓘ Talc
Formula: Mg3Si4O10(OH)2

Gallery:

Be3Al2(Si6O18)ⓘ Beryl var. Emerald
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Emerald

Cobra pit, Gravelotte Emerald Mine, Gravelotte, Murchison Range, Ba-Phalaborwa Local Municipality, Mopani District Municipality, Limpopo, South Africa
trans.png
Emerald

Cobra pit, Gravelotte Emerald Mine, Gravelotte, Murchison Range, Ba-Phalaborwa Local Municipality, Mopani District Municipality, Limpopo, South Africa
trans.png
Emerald

Cobra pit, Gravelotte Emerald Mine, Gravelotte, Murchison Range, Ba-Phalaborwa Local Municipality, Mopani District Municipality, Limpopo, South Africa
trans.png
Emerald

Cobra pit, Gravelotte Emerald Mine, Gravelotte, Murchison Range, Ba-Phalaborwa Local Municipality, Mopani District Municipality, Limpopo, South Africa
trans.png
Emerald

Cobra pit, Gravelotte Emerald Mine, Gravelotte, Murchison Range, Ba-Phalaborwa Local Municipality, Mopani District Municipality, Limpopo, South Africa
trans.png
Emerald

Cobra pit, Gravelotte Emerald Mine, Gravelotte, Murchison Range, Ba-Phalaborwa Local Municipality, Mopani District Municipality, Limpopo, South Africa
trans.png
Emerald

Cobra pit, Gravelotte Emerald Mine, Gravelotte, Murchison Range, Ba-Phalaborwa Local Municipality, Mopani District Municipality, Limpopo, South Africa
trans.png
Emerald

Cobra pit, Gravelotte Emerald Mine, Gravelotte, Murchison Range, Ba-Phalaborwa Local Municipality, Mopani District Municipality, Limpopo, South Africa
trans.png
Emerald

Cobra pit, Gravelotte Emerald Mine, Gravelotte, Murchison Range, Ba-Phalaborwa Local Municipality, Mopani District Municipality, Limpopo, South Africa
trans.png
Emerald

Cobra pit, Gravelotte Emerald Mine, Gravelotte, Murchison Range, Ba-Phalaborwa Local Municipality, Mopani District Municipality, Limpopo, South Africa

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘNative Bismuth1.CA.05Bi
Group 2 - Sulphides and Sulfosalts
ⓘChalcopyrite2.CB.10aCuFeS2
ⓘMolybdenite2.EA.30MoS2
ⓘPyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
ⓘQuartz4.DA.05SiO2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘScheelite7.GA.05Ca(WO4)
Group 9 - Silicates
ⓘPhenakite9.AA.05Be2SiO4
ⓘBeryl9.CJ.05Be3Al2(Si6O18)
ⓘvar. Emerald9.CJ.05Be3Al2(Si6O18)
ⓘSchorl9.CK.05NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
ⓘActinolite9.DE.10◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
ⓘTalc9.EC.05Mg3Si4O10(OH)2
ⓘMuscovite9.EC.15KAl2(AlSi3O10)(OH)2
Unclassified
ⓘ'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ'Chlorite Group'-
ⓘ'Feldspar Group'-
ⓘ'Plagioclase'-(Na,Ca)[(Si,Al)AlSi2]O8
ⓘ'Apatite'-Ca5(PO4)3A

List of minerals for each chemical element

HHydrogen
Hⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Hⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Hⓘ TalcMg3Si4O10(OH)2
BeBeryllium
Beⓘ BerylBe3Al2(Si6O18)
Beⓘ Beryl var. EmeraldBe3Al2(Si6O18)
Beⓘ PhenakiteBe2SiO4
BBoron
Bⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
OOxygen
Oⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Oⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oⓘ BerylBe3Al2(Si6O18)
Oⓘ Beryl var. EmeraldBe3Al2(Si6O18)
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ PhenakiteBe2SiO4
Oⓘ QuartzSiO2
Oⓘ ScheeliteCa(WO4)
Oⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Oⓘ TalcMg3Si4O10(OH)2
Oⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Oⓘ ApatiteCa5(PO4)3A
FFluorine
Fⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
NaSodium
Naⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Naⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
MgMagnesium
Mgⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Mgⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Mgⓘ TalcMg3Si4O10(OH)2
AlAluminium
Alⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alⓘ BerylBe3Al2(Si6O18)
Alⓘ Beryl var. EmeraldBe3Al2(Si6O18)
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Alⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
SiSilicon
Siⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Siⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Siⓘ BerylBe3Al2(Si6O18)
Siⓘ Beryl var. EmeraldBe3Al2(Si6O18)
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ PhenakiteBe2SiO4
Siⓘ QuartzSiO2
Siⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Siⓘ TalcMg3Si4O10(OH)2
Siⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
PPhosphorus
Pⓘ ApatiteCa5(PO4)3A
SSulfur
Sⓘ ChalcopyriteCuFeS2
Sⓘ MolybdeniteMoS2
Sⓘ PyriteFeS2
KPotassium
Kⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Caⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Caⓘ ScheeliteCa(WO4)
Caⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Caⓘ ApatiteCa5(PO4)3A
TiTitanium
Tiⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
FeIron
Feⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Feⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Feⓘ ChalcopyriteCuFeS2
Feⓘ PyriteFeS2
Feⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
CuCopper
Cuⓘ ChalcopyriteCuFeS2
MoMolybdenum
Moⓘ MolybdeniteMoS2
WTungsten
Wⓘ ScheeliteCa(WO4)
BiBismuth
Biⓘ Native BismuthBi

Other Regions, Features and Areas containing this locality

AfricaContinent
Somali PlateTectonic Plate
South Africa

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.

References

ROBB L. J. and ROBB V. M. ( 1986) The nature of Archaean pegmatite deposits in the north-eastern Transvaal. In Mineral Deposits of Southern Africa (ed. C. R. ANHAEUSSER and S. MASKE), Geological Society of South Africa, Vol. I, pp. 437-439.
Gübelin, E. and Wolgensinger, M. (1976) Edelstenen. Uitgeverij Artis, Brussel (in Dutch) (as "Cobra-Somerset").
Yin Yin Nwe, , Morteani, Giulio (1993) Fluid evolution in the H2O-CH4-CO2-NaCl system during emerald mineralization at Gravelotte, Murchison Greenstone Belt, Northeast Transvaal, South Africa. Geochimica et Cosmochimica Acta, 57 (1) 89-103 doi:10.1016/0016-7037(93)90471-8
Cairncross, B., Dixon, R. (1995) Minerals of South Africa. Geological Society of South Africa. p.1-290.p.188
Lum, J.E., Viljoen, K.S., Cairncross, B. (2016) Mineralogical and geochemical characteristics of emeralds from the Leydsdorp area, South Africa. South African Journal of Geology, 119 (2) 359-378 doi:10.2113/gssajg.119.2.359
Lum, J.E. (2017) A mineralogical and geochemical characterisation of beryl from Southern Africa. Ph.D. thesis. University of Johannesburg, South Africa, 308 pages [Features analyses of Gravelotte mine emeralds].
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