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Lesedi La Rona
Lesedi La Rona, formerly known in media as Karowe AK6 or as Quad 1 by the personnel at the mine, is the fourth-largest diamond ever found, and the third-largest of gem quality. It was found in the Karowe mine, (formerly called AK6) in Botswana on 16November 2015. British jeweller Graff bought the rough diamond for $53 million in 2017. By April 2019, Graff had cut it into one large emerald cut diamond, the Graff Lesedi La Rona, weighing and 66 smaller stones. Description The Lesedi La Rona is a colourless/white, type IIa diamond. It weighs and measures . In comparison, the Cullinan, discovered in 1905 in South Africa, weighed . The Lesedi La Rona was mined using Large Diamond Recovery ("LDR") XRT machines, and is the largest diamond recovered using machines for automated diamond sorting. It is estimated to be over 2.5 billion years old. It was found on 16November 2015, in the South Lobe of the Karowe mine about below the surface, and the find was announced on 18Novem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diamond Type
Diamond type is a method of scientifically classifying diamonds by the level and type of their chemical impurities. Diamonds are separated into five types: Type Ia, Type Ib, Type 1aB, Type IIa, and Type IIb. The impurities measured are at the atomic level within the crystal lattice of carbon atoms and so, unlike inclusions, require an infrared spectrometer to detect. Different diamond types react in different ways to diamond enhancement techniques. Different types can coexist within a single stone; natural diamonds are often mixes of Type Ia and Ib, which can be determined by their infrared absorption spectrum. Types of Diamond Type I Type I diamonds, the most common class, contain nitrogen atoms as their main impurity, commonly at a concentration of 0.1%. Type I diamonds absorb in both the infrared and ultraviolet region, from 320 nm. They also have a characteristic fluorescence and visible absorption spectrum (see Optical properties ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mmadikola
Mmadikola is a village in the Central District of Botswana. It is located in the western part of the district, close to Makgadikgadi Pan, and it has a primary school. The population was 828 in 2001 census. Mmadikola is a small rural village. It has a population of around 5000, mixed with Bayei (who make large part of the population), Bakalanga, Bananjwa and Banoka. The reasons for the small population may be that people migrated from the village because there are no industries set up, no minerals to extract, and poor soils for both pastoral and arable farming. Somewhere in the 1900s due to divide and rule, the Yeyi people were moved from areas around Maun to the central district. According to the elders, the few Yei people that were migrated from the Ngami region pleaded with the authorities at the time to at least leave them at Mmadikola, the reason being they are people of the water as their name carries that meaning. At the time a large area of Mmadikola was covered with wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
London
London is the capital and List of urban areas in the United Kingdom, largest city of England and the United Kingdom, with a population of just under 9 million. It stands on the River Thames in south-east England at the head of a estuary down to the North Sea, and has been a major settlement for two millennia. The City of London, its ancient core and financial centre, was founded by the Roman Empire, Romans as ''Londinium'' and retains its medieval boundaries.See also: Independent city#National capitals, Independent city § National capitals The City of Westminster, to the west of the City of London, has for centuries hosted the national Government of the United Kingdom, government and Parliament of the United Kingdom, parliament. Since the 19th century, the name "London" has also referred to the metropolis around this core, historically split between the Counties of England, counties of Middlesex, Essex, Surrey, Kent, and Hertfordshire, which largely comprises Greater London ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Forbes
''Forbes'' () is an American business magazine owned by Integrated Whale Media Investments and the Forbes family. Published eight times a year, it features articles on finance, industry, investing, and marketing topics. ''Forbes'' also reports on related subjects such as technology, communications, science, politics, and law. It is based in Jersey City, New Jersey. Competitors in the national business magazine category include '' Fortune'' and '' Bloomberg Businessweek''. ''Forbes'' has an international edition in Asia as well as editions produced under license in 27 countries and regions worldwide. The magazine is well known for its lists and rankings, including of the richest Americans (the Forbes 400), of the America's Wealthiest Celebrities, of the world's top companies (the Forbes Global 2000), Forbes list of the World's Most Powerful People, and The World's Billionaires. The motto of ''Forbes'' magazine is "Change the World". Its chair and editor-in-chief is Stev ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diamond Color
A chemically pure and structurally perfect diamond is perfectly transparent with no hue, or ''color''. However, in reality almost no gem-sized natural diamonds are absolutely perfect. The color of a diamond may be affected by chemical impurities and/or structural defects in the crystal lattice. Depending on the hue and intensity of a diamond's coloration, a diamond's color can either detract from or enhance its value. For example, most white diamonds are discounted in price when more yellow hue is detectable, while intense pink diamonds or blue diamonds (such as the Hope Diamond) can be dramatically more valuable. Of all colored diamonds, red diamonds are the rarest. The Aurora Pyramid of Hope displays a spectacular array of naturally colored diamonds, including red diamonds. History of color grading Color grading of diamonds was performed as a step of sorting rough diamonds for sale by the London Diamond Syndicate. As the diamond trade developed, early diamond grades were in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diamond Cut
A diamond cut is a style or design guide used when shaping a diamond for polishing such as the brilliant cut. Cut does not refer to shape (pear, oval), but the symmetry, proportioning and polish of a diamond. The cut of a diamond greatly affects a diamond's brilliance; this means if it is cut poorly, it will be less luminous. In order to best use a diamond gemstone's material properties, a number of different diamond cuts have been developed. A diamond cut constitutes a more or less symmetrical arrangement of facets, which together modify the shape and appearance of a diamond crystal. Diamond cutters must consider several factors, such as the shape and size of the crystal, when choosing a cut. The practical history of diamond cuts can be traced back to the Middle Ages, while their theoretical basis was not developed until the turn of the 20th century. Design, creation and innovation continue to the present day: new technology—notably laser cutting and computer-aided design†... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antwerp
Antwerp (; nl, Antwerpen ; french: Anvers ; es, Amberes) is the largest city in Belgium by area at and the capital of Antwerp Province in the Flemish Region. With a population of 520,504,Statistics Belgium; ''Loop van de bevolking per gemeente'' (Excel file) Population of all municipalities in Belgium, . Retrieved 1 November 2017. it is the most populous municipality in Belgium, and with a metropolitan population of around 1,200,000 people, it is the second-largest metro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Debswana
Debswana Diamond Company Limited, or simply Debswana, is a mining company located in Botswana, and is the world's leading producer of diamonds by value. Debswana operates four diamond mines in the eastern and central parts of Botswana, as well as a coal mine. Debswana is a joint venture between the government of Botswana and the South African diamond company De Beers; each party owns 50 percent of the company. Mines The mines owned and operated by Debswana are: *Diamond mines: **Orapa diamond mine, opened in 1971 **Letlhakane diamond mine, opened in 1975 **Jwaneng diamond mine, opened in 1982 **Damtshaa diamond mine, opened in 2003 *Coal mine: ** Morupule Colliery, opened in 1973 History Debswana was formed as the De Beers Botswana Mining Company on the 23rd of June 1968, after De Beers geologists identified diamond-bearing deposits at Orapa in the 1960s. Over the next five years, the government of Botswana increased its ownership stake from an original 15 percent to 50 percent. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Damtshaa Diamond Mine
The Damtshaa diamond mine is a diamond mine located in Botswana about 220 km (137 miles) west of the city of Francistown. Damtshaa, meaning "water for a tortoise", is owned by Debswana, a partnership between the De Beers company, Aquarius Global Resources and the government of Botswana. It is the newest of four mines operated by the company, officially opening on October 25, 2003. Damtshaa is of open pit construction, located on top of four distinct kimberlite pipes of varying ore grade. The mine is forecast to produce about 5 million carats (1,000 kg) of diamond from 39 million tons of ore over the projected 31 year life of the mine. In 2003, the Damtshaa mine produced 292,000 carats (58.4 kg). Recovered ore grade averages about 0.6 carats (12 mg) per metric ton. The ore produced at Damtshaa is processed at a processing plant at its sister mine, the Orapa diamond mine, about distant. The Damtshaa mine is also managed from the Orapa mine The Orapa diamon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orapa
Orapa is a town located in the Central District of Botswana. It is the site of the Orapa diamond mine, the largest diamond-producing mine in the world, and is considered to be the diamond capital of the country. Nearby is another kimberlite mine owned by Lucara Diamond, thought to have very large reserves of diamonds. The town has four schools, one of which teaches in English, serving a community containing a high proportion of immigrants. The population in 1996 was approximately 10,000 but has increased much in the last 10 years and is still increasing, due to the mining output having increased in line with development targets. According to the 2022 Population and Household census, the population of Orapa stood at 8,648. See also * Nwetwe Pan * Sua Pan The Sua Pan or Sowa Pan is a large natural topographic depression within the Makgadikgadi region of Botswana. It is located near the village of ''Sowa'', whose name means salt in the language of the San. The Sua salt pan i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kimberlite
Kimberlite is an igneous rock and a rare variant of peridotite. It is most commonly known to be the main host matrix for diamonds. It is named after the town of Kimberley in South Africa, where the discovery of an diamond called the Star of South Africa in 1869 spawned a diamond rush and the digging of the open-pit mine called the Big Hole. Previously, the term kimberlite has been applied to olivine lamproites as Kimberlite II, however this has been in error. Kimberlite occurs in the Earth's crust in vertical structures known as kimberlite pipes, as well as igneous dykes. Kimberlite also occurs as horizontal sills. Kimberlite pipes are the most important source of mined diamonds today. The consensus on kimberlites is that they are formed deep within the mantle. Formation occurs at depths between , potentially from anomalously enriched exotic mantle compositions, and they are erupted rapidly and violently, often with considerable carbon dioxide and other volatile component ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Letlhakane
Letlhakane is a village in the Central District of Botswana. Letlhakane is the headquarters of the Boteti sub-district. It is located south of Mmatshumo and the population of the village was 22,911 in 2011 census. Within 15–20 km of Letlhakane are four diamond mines. Three of the mines are operated by Debswana: Letlhakane mine in south-east, Orapa in north-west and Damtshaa in north. The other is operated by Boteti Mining (Karowe diamond mine) located in the south-west of the village. Boteti Mining is owned by Lucara Diamonds The Botswana Prison Service (BPS) operates the Letlhakane Prison.Prisons and Rehabilitation " ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
