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- Koffiefontein_mine abstract "Koffiefontein Mine is a diamond mine situated in the Free State province, about 80 km from Kimberley, South Africa. It is one of the many Kimberley mines of which Kimberley mine, de Beers mine, Dutoitspan, Bultfontein and Wesselton are its more famous neighbours. The mine was opened in 1870 and consisted of 1200 claims and worked at a large scale in the beginning of the century. However several sources quote it to have a poor yield: 4 to 5 carat (800 to 1000 mg) in 100 loads and according to Streeter the mines were not profitable at all by the end of the 19th century. Streeter also noted that in particular the diamonds of the Koffiefontein and Jagersfontein were of the "first water"; meaning of very good clarity. There was little on the surface to mark the position of these deposits, some deposits were slightly raised above the surface, some showed a small depression, and it was only after mining started that the extent of the deposits became clear.The mine has been closed several times in its history and never became a large production site. The total production of the mine was 7.3 million carats (1460 kg), and the largest gem weighed 139 carats (27.8 g). The mine was most recently reopened in 1987 however De Beers announced its final closure in January 2006.In November Petra announced it was in advanced talks with De Beers to take over the mine.".
- Koffiefontein_mine thumbnail KoffiefonteinDiamondMineFromAir2012.JPG?width=300.
- Koffiefontein_mine wikiPageID "8478743".
- Koffiefontein_mine wikiPageRevisionID "574015952".
- Koffiefontein_mine hasPhotoCollection Koffiefontein_mine.
- Koffiefontein_mine subject Category:Buildings_and_structures_in_the_Free_State_(province).
- Koffiefontein_mine subject Category:Diamond_mines_in_South_Africa.
- Koffiefontein_mine subject Category:Surface_mines_in_South_Africa.
- Koffiefontein_mine subject Category:Underground_mines_in_South_Africa.
- Koffiefontein_mine point "-29.4 25.016666666666666".
- Koffiefontein_mine type Artifact100021939.
- Koffiefontein_mine type DiamondMinesInSouthAfrica.
- Koffiefontein_mine type Excavation103302121.
- Koffiefontein_mine type Mine103768346.
- Koffiefontein_mine type Object100002684.
- Koffiefontein_mine type PhysicalEntity100001930.
- Koffiefontein_mine type SurfaceMinesInSouthAfrica.
- Koffiefontein_mine type UndergroundMinesInSouthAfrica.
- Koffiefontein_mine type Whole100003553.
- Koffiefontein_mine type YagoGeoEntity.
- Koffiefontein_mine type YagoPermanentlyLocatedEntity.
- Koffiefontein_mine type SpatialThing.
- Koffiefontein_mine comment "Koffiefontein Mine is a diamond mine situated in the Free State province, about 80 km from Kimberley, South Africa. It is one of the many Kimberley mines of which Kimberley mine, de Beers mine, Dutoitspan, Bultfontein and Wesselton are its more famous neighbours. The mine was opened in 1870 and consisted of 1200 claims and worked at a large scale in the beginning of the century.".
- Koffiefontein_mine label "Koffiefontein mine".
- Koffiefontein_mine label "Mine de Koffiefontein".
- Koffiefontein_mine sameAs Mine_de_Koffiefontein.
- Koffiefontein_mine sameAs m.0274yjj.
- Koffiefontein_mine sameAs Q6425688.
- Koffiefontein_mine sameAs Q6425688.
- Koffiefontein_mine sameAs Koffiefontein_mine.
- Koffiefontein_mine lat "-29.4".
- Koffiefontein_mine long "25.016666666666666".
- Koffiefontein_mine wasDerivedFrom Koffiefontein_mine?oldid=574015952.
- Koffiefontein_mine depiction KoffiefonteinDiamondMineFromAir2012.JPG.
- Koffiefontein_mine isPrimaryTopicOf Koffiefontein_mine.
