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Jagersfontein Mine / ˌjeɪɡərzˈfɒnteɪn / was an open-pit mine in South Africa, located close to the town of Jagersfontein and about 110 kilometres (68 miles) south-west of Bloemfontein. [ 1][ 2] Since it was first established, [ 3][ 4] two of the ten biggest diamonds ever discovered, the Excelsior and the Reitz (now called the Jubilee ...
A concrete densifier is a chemical applied to a concrete surface in order to fill pores, increasing surface density [clarification needed].Chemical densifiers are used on polished and non-polished concrete to reduce dusting and wear; on polished concrete surfaces densifiers help concrete take a better polish and make the surface less permeable to liquids so the slab does not require sealing.
Diamond and gold production are now well down from their peaks, though South Africa is still fifth in worldwide gold production, [ 3] but remains a cornucopia of mineral riches. It is the world's largest producer [ 4] of chrome, manganese, platinum, vanadium and vermiculite. It is the second largest producer [ 4] of ilmenite, palladium, rutile ...
Material properties of diamond. Burns above 700 °C in air. Diamond is the allotrope of carbon in which the carbon atoms are arranged in the specific type of cubic lattice called diamond cubic. It is a crystal that is transparent to opaque and which is generally isotropic (no or very weak birefringence ).
The Excelsior Diamond is a gem-quality diamond, and was the largest known diamond in the world from the time of its discovery in 1893 until 1905, when the Cullinan Diamond was found. It was found on June 30, 1893, at the Jagersfontein Mine in South Africa, 130 kilometres (81 miles) south east of Kimberley whose fame as a diamond mining center ...
“I’m always looking for different rainwater harvesting systems,” she said, smiling. In Mexico City, women water harvesters help make up for drought and dicey public water system Skip to main ...
The British South Africa Company (BSAC or BSACo) was chartered in 1889 following the amalgamation of Cecil Rhodes' Central Search Association and the London-based Exploring Company Ltd, which had originally competed to capitalize on the expected mineral wealth of Mashonaland but united because of common economic interests and to secure British government backing.
This is a list of the heads of state of South Africa from the foundation of the Union of South Africa in 1910 to the present day. From 1910 to 1961 the head of state under the South Africa Act 1909 was the Monarch, who was the same person as the Monarch of the United Kingdom and of the other Dominions / Commonwealth realms.
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