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The Williamson Diamond Mine (also known as the Mwadui mine) is a diamond mine northeast of Shinyanga in Tanzania; it became well known as the first significant diamond mine outside of South Africa. The mine was established in 1940 by Dr. John Williamson, a Canadian geologist, and has been continuous operation since then, making it one of the oldest continuously operating diamond mines in the world. Over its lifetime it has produced over 19 million carats (3,800 kg) of diamonds. A 2020 report by ''The Guardian'' said that high-quality pink diamonds from the mine could value up to $700,000 a carat. The Williamson mine was once owned by its namesake Dr. Williamson and later nationalized by the government of Tanzania. Since February 2009 the mine is mostly owned by Petra Diamonds, with 75% ownership, the government of Tanzania owning the remaining 25%. In 2020, the mine came under scrutiny because of alleged human rights violations. Description The Williamson diamond mine i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Petra Diamonds
Petra Diamonds Ltd is a diamond mining group headquartered in Jersey. Petra own one of the world's most productive mines historically, the Premier Mine, Cullinan Diamond Mine is famed for having produced the Cullinan Diamond, world's largest rough and polished diamond. The company is listed on the London Stock Exchange. History Petra Diamonds was founded by Adonis Pouroulis in 1997 and was first listed on the Alternative Investment Market later that year. It transferred to the Main Market in December 2011. Operations Petra Diamonds' operations are focused in Africa: South Africa Petra Diamonds operates three producing diamond mines in South Africa. These are all underground kimberlite pipe mines (Cullinan, Finsch and Koffiefontein). Finsch Mine Finsch diamond mine is one of the world's most important diamond mines and South Africa's second largest diamond operation by production. On 14 September 2011, Petra purchased Finsch as a fully staffed, operating mine from D ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kishapu District
Kishapu District is one of the three districts of the Shinyanga Region of Tanzania. It is bordered to the north by the Maswa District, to the south by the Tabora Region, to the east by the Meatu District and to the west by the Shinyanga Rural and Urban Districts. The open pit Williamson diamond mine The Williamson Diamond Mine (also known as the Mwadui mine) is a diamond mine northeast of Shinyanga in Tanzania; it became well known as the first significant diamond mine outside of South Africa. The mine was established in 1940 by Dr. John Wi ... (also known as Mwadui mine) is located in Kishapu District. According to the 2002 Tanzania National Census, the population of Kishapu District was 240,086 Wards Kishapu District is administratively divided into 20 wards: # Bubiki # Bunambiyu # Itilima # Kiloleli # Kishapu # Lagana # Masanga # Mondo # Mwadui Luhumbo # Mwakipoya # Mwamalasa # Mwamashele # Ngofila # Seke Bugoro # Shagihilu # Somagedi # Songwa # Talaga # Uchunga # Ukeny ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prospecting
Prospecting is the first stage of the geological analysis (followed by exploration) of a territory. It is the search for minerals, fossils, precious metals, or mineral specimens. It is also known as fossicking. Traditionally prospecting relied on direct observation of mineralization in rock outcrops or in sediments. Modern prospecting also includes the use of geologic, geophysical, and geochemical tools to search for anomalies which can narrow the search area. Once an anomaly has been identified and interpreted to be a potential prospect direct observation can then be focused on this area. In some areas a prospector must also make claims, meaning they must erect posts with the appropriate placards on all four corners of a desired land they wish to prospect and register this claim before they may take samples. In other areas publicly held lands are open to prospecting without staking a mining claim. Historical methods The traditional methods of prospecting involved combi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diamond Industry
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 ver ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Douglas C-47B 5H-TBI Wmsn Dia Embak 24
Douglas may refer to: People * Douglas (given name) * Douglas (surname) Animals *Douglas (parrot), macaw that starred as the parrot ''Rosalinda'' in Pippi Longstocking *Douglas the camel Marker for "Douglas The Camel" in Cedar Hill Cemetery, Vicksburg, Mississippi Douglas The Camel, or “Old Douglas,” was a domesticated camel used by Company A of the 43rd Mississippi Infantry, part of the Confederate Army during the Americ ..., a camel in the Confederate Army in the American Civil War Businesses * Douglas Aircraft Company * Douglas (cosmetics), German cosmetics retail chain in Europe * Douglas (motorcycles), British motorcycle manufacturer Peerage and Baronetage * Duke of Douglas * Earl of Douglas, or any holder of the title * Marquess of Douglas, or any holder of the title * Douglas Baronets Peoples * Clan Douglas, a Scottish kindred * Dougla people, West Indians of both African and East Indian heritage Places Australia * Douglas, Queensland, a suburb of Tow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The National Archives UK - CO 1069-157-49
''The'' () is a grammatical article in English, denoting persons or things that are already or about to be mentioned, under discussion, implied or otherwise presumed familiar to listeners, readers, or speakers. It is the definite article in English. ''The'' is the most frequently used word in the English language; studies and analyses of texts have found it to account for seven percent of all printed English-language words. It is derived from gendered articles in Old English which combined in Middle English and now has a single form used with nouns of any gender. The word can be used with both singular and plural nouns, and with a noun that starts with any letter. This is different from many other languages, which have different forms of the definite article for different genders or numbers. Pronunciation In most dialects, "the" is pronounced as (with the voiced dental fricative followed by a schwa) when followed by a consonant sound, and as (homophone of the archaic pron ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prince Philip, Duke Of Edinburgh
Prince Philip, Duke of Edinburgh (born Prince Philip of Greece and Denmark, later Philip Mountbatten; 10 June 1921 – 9 April 2021) was the husband of Queen Elizabeth II. As such, he served as the consort of the British monarch from Elizabeth's accession as queen on 6 February 1952 until his death in 2021, making him the longest-serving royal consort in history. Philip was born in Greece, into the Greek and Danish royal families; his family was exiled from the country when he was eighteen months old. After being educated in France, Germany, and the United Kingdom, he joined the Royal Navy in 1939, when he was 18 years old. In July 1939, he began corresponding with the 13-year-old Princess Elizabeth, the elder daughter and heir presumptive of King George VI. Philip had first met her in 1934. During the Second World War, he served with distinction in the British Mediterranean and Pacific fleets. In the summer of 1946, the King granted Philip permission to marry El ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Elizabeth II Of The United Kingdom
Elizabeth II (Elizabeth Alexandra Mary; 21 April 1926 – 8 September 2022) was Queen of the United Kingdom and other Commonwealth realms from 6 February 1952 until her death in 2022. She was queen regnant of 32 sovereign states during her lifetime, and was head of state of 15 realms at the time of her death. Her reign of 70 years and 214 days was the longest of any British monarch and the longest verified reign of any female monarch in history. Elizabeth was born in Mayfair, London, as the first child of the Duke and Duchess of York (later King George VI and Queen Elizabeth The Queen Mother). Her father acceded to the throne in 1936 upon the abdication of his brother Edward VIII, making the ten-year-old Princess Elizabeth the heir presumptive. She was educated privately at home and began to undertake public duties during the Second World War, serving in the Auxiliary Territorial Service. In November 1947, she married Philip Mountbatten, a former prince of Gre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Williamson Pink Diamond
The Williamson pink diamond is a flawless pink diamond discovered at the Williamson diamond mine in Tanganyika in 1947. The owner of the mine, Canadian geologist John Williamson gave the uncut stone to Princess Elizabeth and Prince Philip upon their wedding in November 1947. The rough diamond was cut by London diamond cutters Briefel and Lemer in 1948, and Cartier was commissioned to create a setting for the main round brilliant cut diamond. The pink diamond became the main feature of a brooch designed by Frederick Mew of Cartier in 1952, forming the centre of a flower with five petals, with white diamonds forming the petals and white baguette cut diamonds as the stalk. The Williamson pink diamond may be the inspiration for the Pink Panther diamond in the 1963 film ''The Pink Panther'' (although another alternative is the ancient Persian pink diamond, the Darya-ye Noor). See also * List of diamonds Diamonds become famous typically for some combination of their size ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ore Grade
Ore is natural Rock (geology), rock or sediment that contains one or more valuable minerals, typically containing metals, that can be mined, treated and sold at a profit.Encyclopædia Britannica. "Ore". Encyclopædia Britannica Online. Retrieved 7 April 2021Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2011, Glossary of Geology: American Geological Institute, 799 p. Ore is extracted from the earth through mining and treated or Refining (metallurgy), refined, often via smelting, to extract the valuable metals or minerals. The ''grade'' of ore refers to the concentration of the desired material it contains. The value of the metals or minerals a rock contains must be weighed against the cost of extraction to determine whether it is of sufficiently high grade to be worth mining, and is therefore considered an ore. Minerals of interest are generally Oxide mineral, oxides, Sulfide mineral, sulfides, silicate minerals, silicates, or native metals such as native copp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hypabyssal
A subvolcanic rock, also known as a hypabyssal rock, is an intrusive igneous rock that is emplaced at depths less than within the crust, and has intermediate grain size and often porphyritic texture between that of volcanic rocks and plutonic rocks. Subvolcanic rocks include diabase (also known as dolerite) and porphyry. Common examples of subvolcanic rocks are diabase, quartz dolerite, microgranite, and diorite. See also * Cone sheet * Dike (geology) * Igneous intrusion * Sill (geology) In geology, a sill is a tabular sheet intrusion that has intruded between older layers of sedimentary rock, beds of volcanic lava or tuff, or along the direction of foliation in metamorphic rock. A ''sill'' is a ''concordant intrusive sheet'', ... References Igneous petrology Volcanology {{Volcanology-stub he:סלע געשי#סלעים תת-געשיים ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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