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Jagersfontein Mine, Jagersfontein, Kopanong Local Municipality, Xhariep District Municipality, Free State, South Africai
Regional Level Types
Jagersfontein MineMine
JagersfonteinTown
Kopanong Local MunicipalityMunicipality
Xhariep District MunicipalityMunicipality
Free StateProvince
South AfricaCountry

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PhotosMapsSearch
Type:
Mine
Mindat Locality ID:
3076
Long-form identifier:
mindat:1:2:3076:5
GUID (UUID V4):
3a053df1-1fc9-4e08-8cdb-ae73f2be24ac
Other Languages:
View 1 more...
Afrikaans:
Jagersfonteinmyn, Jagersfontein, Kopanong Plaaslike Munisipaliteit, Xhariep-distriksmunisipaliteit, Vrystaat, Suid-Afrika
French:
Mine de Jagersfontein, Kopanong, Xhariep, Γ‰tat-Libre, Afrique du Sud
Vietnamese:
Mỏ Jagersfontein, Free State, Nam Phi


A diamond mine in a kimberlite pipe, owned by De Beers.

Diamonds were first found at Jagersfontein farm in 1870, but it took until 1878 to recognize that this occurrence was indeed a pipe.

It was first worked from an open pit because the presence of a thick dolerite sheet made the sidewalls much more stable than those at Kimberley or Koffiefontein.

Underground mining only commenced in 1910.

The mine was worked almost continuously until 1971, except for two short periods of time during the 1930s depression and the Second World War.

Its final closure was due to a decreasing diamond grade and increasing mining costs at greater depths.

Jagersfontein mine produced diamonds of extremely high quality, but the diamond grades were very low.

It also produced a number of the world's largest diamonds, among them the 971.75 ct Excelsior and the 640 ct Jubilee (previously named Reitz).

Among researchers, the deposit is known as a prime locality for mantle xenoliths, some of which are interpreted to have been derived from 300-500 km depths.

Located 2Β½ miles from Jagersfontein.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


25 valid minerals. 1 (TL) - type locality of valid minerals.

Detailed Mineral List:

β“˜ Armalcolite
Formula: (Mg,Fe2+)Ti2O5
β“˜ Baryte
Formula: BaSO4
β“˜ Baryte var. Cerian Barite
Formula: BaSO4
β“˜ Bultfonteinite
Formula: Ca2(HSiO4)F · H2O
β“˜ Chromite
Formula: Fe2+Cr3+2O4
β“˜ Corundum
Formula: Al2O3
β“˜ Diamond
Formula: C
β“˜ Diopside
Formula: CaMgSi2O6
β“˜ Enstatite
Formula: Mg2Si2O6
β“˜ 'Fayalite-Forsterite Series'
β“˜ Fluorapophyllite-(K)
Formula: KCa4(Si8O20)(F,OH) · 8H2O
β“˜ 'Garnet Group'
Formula: X3Z2(SiO4)3
β“˜ Geikielite
Formula: MgTiO3
β“˜ Graphite
Formula: C
β“˜ Ilmenite
Formula: Fe2+TiO3
β“˜ Lindsleyite
Formula: (Ba,Sr)(Zr,Ca)(Fe,Mg)2(Ti,Cr,Fe)18O38
β“˜ Mathiasite (TL)
Formula: (Mg,Cr,Fe,Ca,K)2(Ti,Zr,Cr,Fe)5O12
Type Locality:
β“˜ Natrolite
Formula: Na2Al2Si3O10 · 2H2O
β“˜ Pectolite
Formula: NaCa2Si3O8(OH)
β“˜ Perovskite
Formula: CaTiO3
β“˜ Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
β“˜ Pyrite
Formula: FeS2
β“˜ Pyrope
Formula: Mg3Al2(SiO4)3
β“˜ Quartz
Formula: SiO2
β“˜ Quartz var. Agate
β“˜ Rutile
Formula: TiO2
β“˜ Spinel
Formula: MgAl2O4
β“˜ Thomsonite-Ca
Formula: NaCa2[Al5Si5O20] · 6H2O
β“˜ Titanite
Formula: CaTi(SiO4)O
β“˜ 'UM1984-36-SiO:CaNaZr'
Formula: ~(Zr,Na,Ca)3Si6O17

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
β“˜Graphite1.CB.05aC
β“˜Diamond1.CB.10aC
Group 2 - Sulphides and Sulfosalts
β“˜Pyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
β“˜Spinel4.BB.05MgAl2O4
β“˜Chromite4.BB.05Fe2+Cr3+2O4
β“˜Ilmenite4.CB.05Fe2+TiO3
β“˜Corundum4.CB.05Al2O3
β“˜Geikielite4.CB.05MgTiO3
β“˜Armalcolite4.CB.15(Mg,Fe2+)Ti2O5
β“˜Perovskite4.CC.30CaTiO3
β“˜Lindsleyite4.CC.40(Ba,Sr)(Zr,Ca)(Fe,Mg)2(Ti,Cr,Fe)18O38
β“˜Mathiasite (TL)4.CC.40(Mg,Cr,Fe,Ca,K)2(Ti,Zr,Cr,Fe)5O12
β“˜Quartz4.DA.05SiO2
β“˜var. Agate4.DA.05SiO2
β“˜Rutile4.DB.05TiO2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
β“˜Baryte7.AD.35BaSO4
β“˜var. Cerian Barite7.AD.35BaSO4
Group 9 - Silicates
β“˜Pyrope9.AD.25Mg3Al2(SiO4)3
β“˜Titanite9.AG.15CaTi(SiO4)O
β“˜Bultfonteinite9.AG.80Ca2(HSiO4)F Β· H2O
β“˜Enstatite9.DA.05Mg2Si2O6
β“˜Diopside9.DA.15CaMgSi2O6
β“˜Pectolite9.DG.05NaCa2Si3O8(OH)
β“˜Fluorapophyllite-(K)9.EA.15KCa4(Si8O20)(F,OH) Β· 8H2O
β“˜Phlogopite9.EC.20KMg3(AlSi3O10)(OH)2
β“˜Natrolite9.GA.05Na2Al2Si3O10 Β· 2H2O
β“˜Thomsonite-Ca9.GA.10NaCa2[Al5Si5O20] Β· 6H2O
Unclassified
β“˜'Fayalite-Forsterite Series'-
β“˜'Garnet Group'-X3Z2(SiO4)3
β“˜'UM1984-36-SiO:CaNaZr'-~(Zr,Na,Ca)3Si6O17

List of minerals for each chemical element

HHydrogen
Hβ“˜ BultfonteiniteCa2(HSiO4)F · H2O
Hβ“˜ Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
Hβ“˜ NatroliteNa2Al2Si3O10 · 2H2O
Hβ“˜ PectoliteNaCa2Si3O8(OH)
Hβ“˜ PhlogopiteKMg3(AlSi3O10)(OH)2
Hβ“˜ Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
CCarbon
Cβ“˜ DiamondC
Cβ“˜ GraphiteC
OOxygen
Oβ“˜ Armalcolite(Mg,Fe2+)Ti2O5
Oβ“˜ BaryteBaSO4
Oβ“˜ BultfonteiniteCa2(HSiO4)F · H2O
Oβ“˜ ChromiteFe2+Cr23+O4
Oβ“˜ CorundumAl2O3
Oβ“˜ DiopsideCaMgSi2O6
Oβ“˜ EnstatiteMg2Si2O6
Oβ“˜ Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
Oβ“˜ GeikieliteMgTiO3
Oβ“˜ IlmeniteFe2+TiO3
Oβ“˜ Lindsleyite(Ba,Sr)(Zr,Ca)(Fe,Mg)2(Ti,Cr,Fe)18O38
Oβ“˜ Mathiasite(Mg,Cr,Fe,Ca,K)2(Ti,Zr,Cr,Fe)5O12
Oβ“˜ NatroliteNa2Al2Si3O10 · 2H2O
Oβ“˜ PectoliteNaCa2Si3O8(OH)
Oβ“˜ PerovskiteCaTiO3
Oβ“˜ PhlogopiteKMg3(AlSi3O10)(OH)2
Oβ“˜ PyropeMg3Al2(SiO4)3
Oβ“˜ QuartzSiO2
Oβ“˜ RutileTiO2
Oβ“˜ SpinelMgAl2O4
Oβ“˜ Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
Oβ“˜ TitaniteCaTi(SiO4)O
Oβ“˜ Garnet GroupX3Z2(SiO4)3
Oβ“˜ Baryte var. Cerian BariteBaSO4
Oβ“˜ UM1984-36-SiO:CaNaZr~(Zr,Na,Ca)3Si6O17
FFluorine
Fβ“˜ BultfonteiniteCa2(HSiO4)F · H2O
Fβ“˜ Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
NaSodium
Naβ“˜ NatroliteNa2Al2Si3O10 · 2H2O
Naβ“˜ PectoliteNaCa2Si3O8(OH)
Naβ“˜ Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
Naβ“˜ UM1984-36-SiO:CaNaZr~(Zr,Na,Ca)3Si6O17
MgMagnesium
Mgβ“˜ Armalcolite(Mg,Fe2+)Ti2O5
Mgβ“˜ DiopsideCaMgSi2O6
Mgβ“˜ EnstatiteMg2Si2O6
Mgβ“˜ GeikieliteMgTiO3
Mgβ“˜ Lindsleyite(Ba,Sr)(Zr,Ca)(Fe,Mg)2(Ti,Cr,Fe)18O38
Mgβ“˜ Mathiasite(Mg,Cr,Fe,Ca,K)2(Ti,Zr,Cr,Fe)5O12
Mgβ“˜ PhlogopiteKMg3(AlSi3O10)(OH)2
Mgβ“˜ PyropeMg3Al2(SiO4)3
Mgβ“˜ SpinelMgAl2O4
AlAluminium
Alβ“˜ CorundumAl2O3
Alβ“˜ NatroliteNa2Al2Si3O10 · 2H2O
Alβ“˜ PhlogopiteKMg3(AlSi3O10)(OH)2
Alβ“˜ PyropeMg3Al2(SiO4)3
Alβ“˜ SpinelMgAl2O4
Alβ“˜ Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
SiSilicon
Siβ“˜ BultfonteiniteCa2(HSiO4)F · H2O
Siβ“˜ DiopsideCaMgSi2O6
Siβ“˜ EnstatiteMg2Si2O6
Siβ“˜ Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
Siβ“˜ NatroliteNa2Al2Si3O10 · 2H2O
Siβ“˜ PectoliteNaCa2Si3O8(OH)
Siβ“˜ PhlogopiteKMg3(AlSi3O10)(OH)2
Siβ“˜ PyropeMg3Al2(SiO4)3
Siβ“˜ QuartzSiO2
Siβ“˜ Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
Siβ“˜ TitaniteCaTi(SiO4)O
Siβ“˜ Garnet GroupX3Z2(SiO4)3
Siβ“˜ UM1984-36-SiO:CaNaZr~(Zr,Na,Ca)3Si6O17
SSulfur
Sβ“˜ BaryteBaSO4
Sβ“˜ PyriteFeS2
Sβ“˜ Baryte var. Cerian BariteBaSO4
KPotassium
Kβ“˜ Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
Kβ“˜ Mathiasite(Mg,Cr,Fe,Ca,K)2(Ti,Zr,Cr,Fe)5O12
Kβ“˜ PhlogopiteKMg3(AlSi3O10)(OH)2
CaCalcium
Caβ“˜ BultfonteiniteCa2(HSiO4)F · H2O
Caβ“˜ DiopsideCaMgSi2O6
Caβ“˜ Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
Caβ“˜ Lindsleyite(Ba,Sr)(Zr,Ca)(Fe,Mg)2(Ti,Cr,Fe)18O38
Caβ“˜ Mathiasite(Mg,Cr,Fe,Ca,K)2(Ti,Zr,Cr,Fe)5O12
Caβ“˜ PectoliteNaCa2Si3O8(OH)
Caβ“˜ PerovskiteCaTiO3
Caβ“˜ Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
Caβ“˜ TitaniteCaTi(SiO4)O
Caβ“˜ UM1984-36-SiO:CaNaZr~(Zr,Na,Ca)3Si6O17
TiTitanium
Tiβ“˜ Armalcolite(Mg,Fe2+)Ti2O5
Tiβ“˜ GeikieliteMgTiO3
Tiβ“˜ IlmeniteFe2+TiO3
Tiβ“˜ Lindsleyite(Ba,Sr)(Zr,Ca)(Fe,Mg)2(Ti,Cr,Fe)18O38
Tiβ“˜ Mathiasite(Mg,Cr,Fe,Ca,K)2(Ti,Zr,Cr,Fe)5O12
Tiβ“˜ PerovskiteCaTiO3
Tiβ“˜ RutileTiO2
Tiβ“˜ TitaniteCaTi(SiO4)O
CrChromium
Crβ“˜ ChromiteFe2+Cr23+O4
Crβ“˜ Lindsleyite(Ba,Sr)(Zr,Ca)(Fe,Mg)2(Ti,Cr,Fe)18O38
Crβ“˜ Mathiasite(Mg,Cr,Fe,Ca,K)2(Ti,Zr,Cr,Fe)5O12
FeIron
Feβ“˜ Armalcolite(Mg,Fe2+)Ti2O5
Feβ“˜ ChromiteFe2+Cr23+O4
Feβ“˜ IlmeniteFe2+TiO3
Feβ“˜ Lindsleyite(Ba,Sr)(Zr,Ca)(Fe,Mg)2(Ti,Cr,Fe)18O38
Feβ“˜ Mathiasite(Mg,Cr,Fe,Ca,K)2(Ti,Zr,Cr,Fe)5O12
Feβ“˜ PyriteFeS2
SrStrontium
Srβ“˜ Lindsleyite(Ba,Sr)(Zr,Ca)(Fe,Mg)2(Ti,Cr,Fe)18O38
ZrZirconium
Zrβ“˜ Lindsleyite(Ba,Sr)(Zr,Ca)(Fe,Mg)2(Ti,Cr,Fe)18O38
Zrβ“˜ Mathiasite(Mg,Cr,Fe,Ca,K)2(Ti,Zr,Cr,Fe)5O12
Zrβ“˜ UM1984-36-SiO:CaNaZr~(Zr,Na,Ca)3Si6O17
BaBarium
Baβ“˜ BaryteBaSO4
Baβ“˜ Lindsleyite(Ba,Sr)(Zr,Ca)(Fe,Mg)2(Ti,Cr,Fe)18O38
Baβ“˜ Baryte var. Cerian BariteBaSO4

Fossils

This region is too big or complex to display the fossil list, try looking at smaller subregions.

Other Databases

Wikipedia:https://en.wikipedia.org/wiki/Jagersfontein_Mine


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

Rocks & Minerals (xxxx) 21:130.
Dana 7: I: 150.
(n.d.)
Truswell, J. F. (1955) A PETROLOGICAL STUDY OF DOLERITE SILLS IN THE JAGERSFONTEIN DIAMOND MINE, ORANGE FREE STATE. Transactions of the Royal Society of South Africa, 34 (3), 409-416. doi:10.1080/00359195509518999
Mathias, M., Siebert, J.C., Rickwood, P.C. (1970) Some Aspects of the Mineralogy and Petrology of Ultramafic Xenoliths in Kimberlite. Contributions to Mineralogy and Petrology: 26: 75-123.
Borley, G. D., Suddaby, P. (1975) Stressed pyroxenite nodules from the Jagersfontein kimberlite. Mineralogical Magazine, 40, 6-12. doi:10.1180/minmag.1975.040.309.02
GΓΌbelin, E., Wolgensinger, M. (1976) Edelstenen. Uitgeverij Artis, Brussel (in Dutch).
Exley, Richard A., Smith, Joseph V., Dawson, J. Barry (1983) Alkremite, garnetite and eclogite xenoliths from Bellsbank and Jagersfontein, South Africa. American Mineralogist, 68 (5-6), 512-516.
Boyd, F.R, Dawson, J.B, Smith, J.V (1984) Granny Smith diopside megacrysts from the kimberlites of the Kimberley area and Jagersfontein, South Africa. Geochimica et Cosmochimica Acta, 48 (2), 381-384. doi:10.1016/0016-7037(84)90258-8
Dawson, J.B., Smith, J.V. (1986) Relationships between eclogites and certain megacrysts from the Jagersfontein kimberlite, South Africa. Lithos, 19 (3), 325-330.
Winterburn, Peter A, Harte, Ben, Gurney, John J (1990) Peridotite xenoliths from the Jagersfontein kimberlite pipe: I. Primary and primary-metasomatic mineralogy. Geochimica et Cosmochimica Acta, 54 (2), 329-341. doi:10.1016/0016-7037(90)90322-c
Hops, J.J., Gurney, J.J., Harte, B. (1992) The jagersfontein Cr-poor megacryst suite β€” towards a model for megacryst petrogenesis. Journal of Volcanology and Geothermal Research, 50 (1), 143-160. doi:10.1016/0377-0273(92)90042-c
Pyle, Joseph M., Haggerty, Stephen E. (1998) Eclogites and the Metasomatism of Eclogites from the Jagersfontein Kimberlite: Punctuated Transport and Implications for Alkali Magmatism. Geochimica et Cosmochimica Acta, 62 (7), 1207-1231. doi:10.1016/s0016-7037(98)00040-4
Cook, Robert B. (2000) Diamond, Jagersfontein Mine, Free State Province, South Africa. Rocks & Minerals, 75 (5), 344-349. doi:10.1080/00357520009603092
Tappert, Ralf, Stachel, Thomas, Harris, Jeff W., Muehlenbachs, Karlis, Ludwig, Thomas, Brey, Gerhard P. (2005) Diamonds from Jagersfontein (South Africa): messengers from the sublithospheric mantle. Contributions to Mineralogy and Petrology, 150 (5), 505-522. doi:10.1007/s00410-005-0035-6
Field, Matthew, Stiefenhofer, Johann, Robey, Jock, Kurszlaukis, Stephan (2008) Kimberlite-hosted diamond deposits of southern Africa: A review. Ore Geology Reviews: 34(1): 33-75.
Haggerty, S.E. (2017) Majorite-indicative ultradeep (>300 km) xenoliths with spinel associations from the Jagersfontein kimberlite, South Africa. South African Journal of Geology, 120 (1), 1-20. doi:10.25131/gssajg.120.1.1
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