|
List Of Largest Rough Diamonds
This is a partial list of the largest non-synthetic diamonds with a rough stone (uncut) weight of over 200 carats (40 grams). The list is not intended to be complete – e.g., the Cullinan (formerly Premier Premier is a title for the head of government in central governments, state governments and local governments of some countries. A second in command to a premier is designated as a deputy premier. A premier will normally be a head of governm ...) mine alone has produced 135 diamonds larger than 200 carats since mining commenced. De Beers generally does not publish information relating to large diamond discoveries. See also * List of diamonds * List of emeralds by size * List of individual gemstones * List of gold nuggets by size * List of sapphires by size References External links * {{List of precious stones by size * Largest rough diamonds diamonds Diamonds Diamonds, rough ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diamond
Diamond is a solid form of the element carbon with its atoms arranged in a crystal structure called diamond cubic. Another solid form of carbon known as graphite is the chemically stable form of carbon at room temperature and pressure, but diamond is metastable and converts to it at a negligible rate under those conditions. Diamond has the highest hardness and thermal conductivity of any natural material, properties that are used in major industrial applications such as cutting and polishing tools. They are also the reason that diamond anvil cells can subject materials to pressures found deep in the Earth. Because the arrangement of atoms in diamond is extremely rigid, few types of impurity can contaminate it (two exceptions are boron and nitrogen). Small numbers of defects or impurities (about one per million of lattice atoms) color diamond blue (boron), yellow (nitrogen), brown (defects), green (radiation exposure), purple, pink, orange, or red. Diamond also has a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 18Novembe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mbuji-Mayi
Mbuji-Mayi or Mbujimayi (formerly Bakwanga) is a city and the capital of Kasai-Oriental Province in the south-central Democratic Republic of Congo. It is the second largest city in the country, following the capital Kinshasa but ahead of Lubumbashi, Kisangani and Kananga, though the exact population is not known. Estimates ranged from a 2010 '' CIA World Factbook'' estimated population of 1,480,000 to as many as 3,500,000 estimated by the United Nations in 2008. Mbuji-Mayi lies in Luba country on the Mbuji-Mayi River. The name Mbuji-Mayi comes from the local language, Tshiluba, and translates as "Goat-Water," a name deriving from the great number of goats in the region. Despite its large population, the city remains remote, having little connection to surrounding provinces or to Kinshasa and Lubumbashi. However, Mbuji-Mayi is the traditional centre of industrial diamond mining in Congo, with it being located on top of one of the largest known deposits in the world. Air trave ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Millennium Star
The Millennium Star is a diamond owned by De Beers. At 203.04 carats (40.608 g), it is the world's second largest known top-color (grade D, i.e. colourless), internally and externally flawless, pear-shaped diamond. The diamond was discovered in the Mbuji-Mayi district of Zaire in 1990 in alluvial Alluvium (from Latin ''alluvius'', from ''alluere'' 'to wash against') is loose clay, silt, sand, or gravel that has been deposited by running water in a stream bed, on a floodplain, in an alluvial fan or beach, or in similar settings. Al ... deposits; uncut, it was 777 carats (155.4 g). It was purchased by De Beers during the height of the country's Civil War that took place in the early to mid-nineties. It took over three years for workers of the Steinmetz Diamond Group to produce the classic pear form. The cutting was done using lasers. It was first displayed in October 1999 as the centerpiece of the De Beers Millennium diamond collection. The collection ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kollur Mine
Kollur Mine was a series of gravel-clay pits on the south bank of the Krishna River in the Golconda Sultanate of India. It currently falls within the state of Andhra Pradesh. It is thought to have produced many large diamonds, known as Golconda diamonds, several of which are or have been a part of crown jewels. The mine was established in the 16th century and operated until the 19th century. History Kollur Mine operated between the 16th and mid-19th centuries, and was one of the largest and most productive diamond mines on the Indian subcontinent. At the height of production, around 30,000 – 60,000 people worked there, including men, women, and children of all ages. Kollur itself had a population of around 100,000. Golconda mines were owned by the king, but operation was leased to diamond merchants, either foreigners or Indians of the goldsmith caste. As well as rent, the king also received 2% from sales and he was entitled to keep all diamonds weighing over 10 ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Koh-i-Noor
The Koh-i-Noor ( ; from ), also spelled Kohinoor and Koh-i-Nur, is one of the List of diamonds, largest cut diamonds in the world, weighing . It is part of the Crown Jewels of the United Kingdom. The diamond is currently set in the Crown of Queen Elizabeth The Queen Mother. There are multiple conflicting legends on the origin of the diamond. However, in the words of Theo Metcalfe there is 'very meager and imperfect' evidence of the early history of the Koh-i-Noor before the 1740s, that can directly tie it to any ancient diamond. There is no record of its original weight, but the earliest attested weight is 186 old carats (191 metric carats or 38.2 g). The first verifiable record of the diamond comes from a history by Muhammad Kazim Marvi of the 1740s Nader Shah's invasion of India, Invasion of Northern India. Marvi notes that the Koh-i-Noor as being one of many stones on the Mughal emperors, Mughal Peacock Throne that Nader Shah looted from Delhi. The diamond then changed ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nemesis International DMCC
In ancient Greek religion, Nemesis, also called Rhamnousia or Rhamnusia ( grc, Ῥαμνουσία, Rhamnousía, the goddess A goddess is a female deity. In many known cultures, goddesses are often linked with literal or metaphorical pregnancy or imagined feminine roles associated with how women and girls are perceived or expected to behave. This includes themes of s ... of Rhamnous), was the goddess who personifies divine retribution, retribution, a central concept in the Greek world view. Etymology The name ''Nemesis'' is related to the Greek language, Greek word νέμειν ''némein'', meaning "to give what is due", from Proto-Indo-European ''nem-'' "distribute". Family Nemesis has been described as the daughter of Oceanus, Erebus, or Zeus, but according to Hyginus she was a child of Erebus and Nyx. She has also been described, by Hesiod, as the daughter of Nyx alone. In the Theogony, Nemesis is the sister of the Moirai (the Fates), the Keres (mythology), Keres (Bl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Louis Glick , names sometimes translated to English as "Louis"
{{disambiguation ...
Louis may refer to: * Louis (coin) * Louis (given name), origin and several individuals with this name * Louis (surname) * Louis (singer), Serbian singer * HMS ''Louis'', two ships of the Royal Navy See also Derived or associated terms * Lewis (other) * Louie (other) * Luis (other) * Louise (other) * Louisville (other) * Louis Cruise Lines * Louis dressing, for salad * Louis Quinze, design style Associated names * * Chlodwig, the origin of the name Ludwig, which is translated to English as "Louis" * Ladislav and László - names sometimes erroneously associated with "Louis" * Ludovic, Ludwig, Ludwick, Ludwik Ludwik () is a Polish given name. Notable people with the name include: * Ludwik Czyżewski, Polish WWII general * Ludwik Fleck (1896–1961), Polish medical doctor and biologist * Ludwik Gintel (1899–1973), Polish-Israeli Olympic soccer play ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Incomparable Diamond
Brown diamonds are the most common color variety of natural diamonds. In most mines, brown diamonds account for 15% of production. The brown color makes them less attractive to some people as gemstones, and most are used for industrial purposes. However, improved marketing programs, especially in Australia and the United States, have resulted in brown diamonds becoming valued as gemstones and even referred to as ''chocolate diamonds''. A significant portion of the output of Australian diamond mines is brown stones. There are several causes for the brown color, including irradiation treatment, nickel impurities and lattice defects associated with plastic deformation; the last is the predominant cause, especially in pure diamonds. A high-pressure high-temperature treatment can heal lattice defects and convert brown diamonds into yellow or even colorless stones. Rise in popularity Baumgold Bros., a diamond cutter and fine jewelry importer in the 1950s and 1960s, rebranded brown di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Letseng Mine
The Letšeng Diamond Mine, found in the landlocked Southern African kingdom of Lesotho, is owned by Gem Diamonds, Ltd. and the government of Lesotho, and at an elevation of 3,100 m (10,000 ft) it is the world's highest diamond mine. Production It is characterised by extremely low grade ore (less than /hundred tons) and is known for producing huge diamonds, having the highest percentage of large diamonds (greater than ), giving it the highest dollar value per carat of any diamond mine. The world average is roughly US$81 per carat, while Letšeng averaged over US$1,894 per carat for the first six months of 2007. Unusual for Africa, and due to the elevation, temperatures at the mine drop to -20 °C, and snowfalls are common in winter. Geography Climate Letšeng has an alpine tundra climate (''ET'', according to the Köppen climate classification). This means that Letšeng has a chilly climate with fairly cool temperatures throughout the year, even for Le ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harry Winston
Harry Winston (March 1, 1896December 8, 1978) was an American jeweler. He donated the Hope Diamond to the Smithsonian Institution in 1958 after owning it for a decade. He also traded the Portuguese Diamond to the Smithsonian in 1963 in exchange for 3,800 carats of small diamonds. Winston founded the Harry Winston Inc. in New York City in 1932. He had been called by many the "King of Diamonds". History Winston's father Jacob started a small jewelry business. He and Winston's mother were Jewish immigrants to the United States from the Russian Empire. While growing up, Harry worked in his father's shop. When he was twelve years old, he recognized a two-carat emerald in a pawn shop, bought it for 25 cents, and sold it two days later for $800. Winston started his business in 1920 and opened his first store in New York City in 1932. Winston's jewelry empire began in 1926, with his acquisition of Arabella Huntington's jewelry collection, for $1.2 million. The wife of railroad mag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
