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TanzaniteOne
TanzaniteOne (TanzaniteOne Mining Ltd) is a gemstone mining company which exclusively mines the blue gemstone, tanzanite. TanzaniteOne Mining Ltd is located in Block C, Merelani, Tanzania. Merelani is the world's only known source of tanzanite. TanzaniteOne Mining Ltd was founded by Richland Resources, a gemstone development and mining company who were listed on the London Stock Exchanges AIM market (AIM:RLD) in 1994 . In 2014 TanzaniteOne was sold to a private company, Sky Associates, who are now the current owners. The tanzanite resource is a long narrow area, divided into four blocks: named " A" to "D". TanzaniteOne Mining own the licence to mine the largest area Block C. Medium scale mining is undertaken by Kilimanjaro Mining in Block A and Tanzanite Africa in Block D-extension. The Company’s neighbouring Blocks B and D are mined largely by thousands of artisanal miners who use non mechanised methods which do not allow them to mine as deep or as efficiently as Tanzanite On ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tanzanite
Tanzanite is the blue and violet variety of the mineral zoisite (a calcium aluminium hydroxyl sorosilicate), caused by small amounts of vanadium. Tanzanite belongs to the epidote mineral group. Tanzanite is only found in Simanjiro District of Manyara Region in Tanzania, in a very small mining area (approximately long and wide) near the Mererani Hills. Tanzanite is noted for its remarkably strong trichroism, appearing alternately blue, violet and burgundy depending on crystal orientation. Tanzanite can also appear differently when viewed under different lighting conditions. The blues appear more evident when subjected to fluorescent light and the violet hues can be seen readily when viewed under incandescent illumination. In its rough state tanzanite is colored a reddish brown to clear, and it requires heat treatment to remove the brownish "veil" and bring out the blue violet of the stone. The gemstone was given the name 'tanzanite' by Tiffany & Co. after Tanzania, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Richland Resources
Richland Resources Ltd is a gemstone mining, development and exploration company who are listed on the London Stock Exchanges AIM market. (AIM:RLD) Richlands developed and operated TanzaniteOne Mining Ltd – the world's largest tanzanite gemstone mining company, based in Merelani, Tanzania from August 2004 until March 2015. The Company also developed a beneficiation division for the sale and export of cut gemstones while establishing a multi-level sales system for retailing ethically sourced gemstones to corporate and individual buyers. Richlands revenue peaked in 2004 at US$22.4 million. Richland Resources sold TanzaniteOne Mining to Dyumna Mining Industries Ltd. in February 2015. Richlands is also responsible for creating the Tanzanite Foundation in 2003 – a non profit organisation which is devoted to the education and promotion of the relatively new gemstone tanzanite. The Tanzanite Foundation also fundraised and facilitated for multiple community projects around the tanza ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mining Company
This is an incomplete alphabetical list of mining companies. A * Adex Mining * Aditya Birla Group * African Rainbow Minerals * Agnico Eagle * Aiteo * Alumina * Anaconda Copper * Anglo American (mining) * Anglo Platinum * AngloGold Ashanti * Antofagasta * Aricom * Arctic Canadian Diamond Company * Astra Resources * Atalaya Mining Minas de Riotinto * Aurubis * Avalon Rare Metals B * Bard Ventures Company * Barrick Gold * BHP * Blaafarveværket * Blackfire Exploration * Boliden * Bougainville Copper * Breakwater Resources C * Cambior * Candente Copper * Canico Resource * Cape Breton Development Corporation * Chinalco * China Molybdenum * Cleveland-Cliffs * CNK International * Coal & Allied * Coal India * Codelco * Colorado Fuel & Iron * Compass Minerals * Compass Resources * Consolidated Zinc * Cordero Mining Company * Crowflight Minerals * Companhia Siderúrgica Nacional * Cuniptau Mines * Cuprom * Cyprus Mines Corporation D * De Beers * Debswana * Doe Run Company * Drummond ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tanzania
Tanzania (; ), officially the United Republic of Tanzania ( sw, Jamhuri ya Muungano wa Tanzania), is a country in East Africa within the African Great Lakes region. It borders Uganda to the north; Kenya to the northeast; Comoro Islands and the Indian Ocean to the east; Mozambique and Malawi to the south; Zambia to the southwest; and Rwanda, Burundi, and the Democratic Republic of the Congo to the west. Mount Kilimanjaro, Africa's highest mountain, is in northeastern Tanzania. According to the United Nations, Tanzania has a population of million, making it the most populous country located entirely south of the equator. Many important hominid fossils have been found in Tanzania, such as 6-million-year-old Pliocene hominid fossils. The genus Australopithecus ranged across Africa between 4 and 2 million years ago, and the oldest remains of the genus '' Homo'' are found near Lake Olduvai. Following the rise of ''Homo erectus'' 1.8 million years ago, humanity sprea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
London Stock Exchange
London Stock Exchange (LSE) is a stock exchange in the City of London, England, United Kingdom. , the total market value of all companies trading on LSE was £3.9 trillion. Its current premises are situated in Paternoster Square close to St Paul's Cathedral in the City of London. Since 2007, it has been part of the London Stock Exchange Group (LSEG, that it also lists ()). The LSE was the most-valued stock exchange in Europe from 2003 when records began till Autumn 2022, when the Paris exchange was briefly larger, until the LSE retook its position as Europe’s largest stock exchange 10 days later. History Coffee House The Royal Exchange had been founded by English financier Thomas Gresham and Sir Richard Clough on the model of the Antwerp Bourse. It was opened by Elizabeth I of England in 1571. During the 17th century, stockbrokers were not allowed in the Royal Exchange due to their rude manners. They had to operate from other establishments in the vicinity, notably ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sky Associates
The sky is an unobstructed view upward from the surface of the Earth. It includes the atmosphere and outer space. It may also be considered a place between the ground and outer space, thus distinct from outer space. In the field of astronomy, the sky is also called the celestial sphere. This is an abstract sphere, concentric to the Earth, on which the Sun, Moon, planets, and stars appear to be drifting. The celestial sphere is conventionally divided into designated areas called constellations. Usually, the term ''sky'' informally refers to a perspective from the Earth's surface; however, the meaning and usage can vary. An observer on the surface of the Earth can see a small part of the sky, which resembles a dome (sometimes called the ''sky bowl'') appearing flatter during the day than at night. In some cases, such as in discussing the weather, the sky refers to only the lower, denser layers of the atmosphere. The daytime sky appears blue because air molecules scat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Artisanal
An artisan (from french: artisan, it, artigiano) is a skilled craft worker who makes or creates material objects partly or entirely by hand. These objects may be functional or strictly decorative, for example furniture, decorative art, sculpture, clothing, food items, household items and tools and mechanisms such as the handmade clockwork movement of a watchmaker. Artisans practice a craft and may through experience and aptitude reach the expressive levels of an artist. History The adjective "artisanal" is often used in describing hand-processing in contrast to an industrial process, such as in the phrase ''artisanal mining''. Thus, "artisanal" is sometimes used in marketing and advertising as a buzz word to describe or imply some relation with the crafting of handmade food products, such as bread, beverages or cheese. Many of these have traditionally been handmade, rural or pastoral goods but are also now commonly made on a larger scale with automated mechanizatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Illegal Mining
Illegal mining is mining activity that is undertaken without state permission, in particular in absence of land rights, mining licenses, and exploration or mineral transportation permits. Illegal mining can be a subsistence activity, as is the case with artisanal mining, or it can belong to large-scale organized crime, spearheaded by illegal mining syndicates. On an international level, approximately 80 percent of small-scale mining operations can be categorized as illegal. Despite strategic developments towards " responsible mining," even big companies can be involved in illegal mineral digging and extraction, if only on the financing side. Regional Issues Sub-Saharan Africa Spurred by widespread poverty and a lack of alternative income-earning opportunities, illegal artisanal mining is a well-documented phenomenon in sub-Saharan Africa. While legalization opportunities for artisanal and small scale mining are often available, inefficient government bureaucracy structures can ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Debeers
De Beers Group is an international corporation that specializes in diamond mining, diamond exploitation, diamond retail, diamond trading and industrial diamond manufacturing sectors. The company is active in open-pit, large-scale alluvial and coastal mining. It operates in 35 countries and mining takes place in Botswana, Namibia, South Africa, Canada and Australia. From its inception in 1888 until the start of the 21st century, De Beers controlled 80% to 85% of rough diamond distribution and was considered a monopoly. Competition has since dismantled the complete monopoly; the De Beers Group now sells approximately 29.5% of the world's rough diamond production by value through its global sightholder and auction sales businesses. The company was founded in 1888 by British businessman Cecil Rhodes, who was financed by the South African diamond magnate Alfred Beit and the London-based N M Rothschild & Sons bank. In 1926, Ernest Oppenheimer, a German immigrant to Britain and lat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jewellery
Jewellery ( UK) or jewelry ( U.S.) consists of decorative items worn for personal adornment, such as brooches, rings, necklaces, earrings, pendants, bracelets, and cufflinks. Jewellery may be attached to the body or the clothes. From a western perspective, the term is restricted to durable ornaments, excluding flowers for example. For many centuries metal such as gold often combined with gemstones, has been the normal material for jewellery, but other materials such as glass, shells and other plant materials may be used. Jewellery is one of the oldest types of archaeological artefact – with 100,000-year-old beads made from '' Nassarius'' shells thought to be the oldest known jewellery.Study reveals 'oldest jewellery' , '' |
