Topaz
Topaz is a gemstone In cut and polished form, it is used to make jewelry or other adornments It also has other uses Orange topaz, also known as precious topaz, is the conventional birthstone for November, the symbol of friendship and the state gemstone of the US state of Utah Blue topaz is the state gemstone of the US state of Texas There are three main mining methods used to extract topaz: openpit mining, underground mining, and alluvial mining Openpit mining involves the use of Topaz Mining: Balancing Resource Extraction and Sustainability
What is Topaz Gemstone Topaz Stone GIA
Topaz is a precious stone, typically colorless, yellow & is Allochromatic, which means that its color is caused by defects in its crystal structure Gem Encyclopedia BirthstonesDownload PDF For over 200 years, the only known source of imperial topaz has been a small mining district near Ouro Preto One of the oldest and most productive mines in The Capão Topaz Deposit, Ouro Preto, Minas Gerais, Brazil
Topaz Gem Guide and Properties Chart Gemstones
The chemical vapor deposition (CVD) process deposits a thin film onto part of the surface of a white topaz gem, creating an eyecatching rainbow effect as light passes through the gem, which results in an unbelievable array Topaz is a precious stone, typically colorless, yellow & is Allochromatic, which means that its color is caused by defects in its crystal structure Gem Encyclopedia BirthstonesWhat is Topaz Gemstone Topaz Stone GIA
Topaz Uses and Properties of the Mineral and Gem
number "8" in the Mohs Hardness Scale a birthstone for the month of November a gemstone of many colors Topaz obtains much of its popularity from its beautiful colors and its status as a birthstone Natural topaz The Batu Hijau mine is an open pit coppergold mine operated by Newmont Mining Corporations subsidiary company PT Newmont Nusa Tenggara The mine is located 1,530 kilometres east of the Indonesian capital Jakarta Batu Hijau mine in United States company Mining
Geita Gold Mine in Tanzania company Mining Companies list, Precious
Company Description The Geita Gold Mine is an open pit gold mine located in the Geita District of the Mwanza Region of Tanzania It is operated by AngloGold Ashanti In 2008, the mine accounted for 6% of the companys overall annual gold production and employed close to 3,200 people The Geita mine commenced production in 2000, initially as aAdex Mining Inc is a Canadian based mining company that specializes in the exploration and development of mineral resources Founded in 1983, Adex Mining Inc has been a leader in the industry for over 35 years, providing quality products and services to customers around the world Adex Mining Inc operates two mines in Canada, one in NewAdex Mining Inc in Canada company Mining Companies list, Precious Stones
Mesa A mine in United Kingdom company Mining Companies list, Precious
The Mesa A mine, sometimes also referred to as Waramboo mine,is an iron ore mine located in the Pilbara region of Western Australia, 50 kilometres west of PannawonicaThe mine is owned by Robe River Iron Associates (53% Rio Tinto) and operated by Rio Tinto Iron Ore and is one of twelve iron ore mines the company operates in the PilbaraAndrew Knowles died in 1847 and a son, John, died in 1852 leaving Robert, Thomas and James Knowles to continue the business Andrew Knowles and Sons is a familyowned mining company that has been in operation since the late 1800s Founded by Andrew Knowles, the company has been passed down through the generations and is currently Andrew Knowles and Sons in United Kingdom company Mining
Srilanka mining ? Sapphire, graphite mines, moonstone, topaz,
The stories of sapphire and graphite mining are the most popular ones in Sri Lanka Over the years a large variety of gems have been exploited which includes sapphire, ruby, chrysoberyl, beryl, spinel, garnet, zircon, aquamarine, moonstone, topaz and, tourmaline Just a few years ago Sri Lanka imposed restrictions on imports of rough gem stonesAlferon Management is a fullservice property management company based in the San Francisco Bay Area Founded in 1981, the company provides a wide range of services to both residential and commercial clients Alferon Management offers everything from leasing and tenant screening to financial services, maintenance, and asset managementAlferon Management in Kazakhstan company Mining Companies list
Aditya Birla Group in India company Mining Companies list, Precious
Aditya Birla Mining is a part of the Aditya Birla Group, one of India’s largest and most diversified conglomerates The company is engaged in the exploration and mining of nonferrous minerals, including copper, gold, silver, lead, zinc, and manganese It is also involved in the production and sale of coal and other industrial pany Description China Metal Recycling (Holdings) Limited is the largest recycler of scrap metal in Mainland China by revenue Based in Guangzhou, Guangdong, it is mainly engaged in collecting scrap steel, scrap copper and other scrap metals and processing them using equipment to produce recycled scrap metals for its customers,Its recyclingChina Metal Recycling in China company Mining Companies list
St Joe Minerals in United States company Mining Companies list
St Joe Minerals Corporation was a mining and manufacturing company based in St Louis, Missouri Founded in 1941, it was the largest producer of lead and zinc in the United States and the largest producer of gold in the world The company was acquired by IMC Global in 1998 and is now part of the Potash Corporation of SaskatchewanThe Emerald Hollow Mine is home to the only emerald mine in the United States open for public treasure hunting You can check out findings from the mine at sluiceways or do your own prospecting, digging, and hunting for Top Spots for Gem Hunting in the US International
Chihong Zinc and Germanium in China company Mining Companies list
Yunnan Chihong Zinc and Germanium Company Limited is the stateowned enterprise engaged in the processing, extracting and prospecting and trading of zinc, lead, germanium and sulphuric acid products The company was founded in Qujing, Yunnan, China in 2000It was listed on the Shanghai Stock Exchange in 2004Yunnan Copper Company Limited (SZSE: ) is the third largest copper producer in China It was established in 1958 in Kunming, Yunnan, formerly Yunnan Smelting PlantIts products include copper cathode, Yunnan Copper in China company Mining
Equinox Minerals in Zambia company Mining Companies list, Precious Stones
Equinox Minerals is a Canadianbased mining company that specializes in the exploration, development, and operation of copper and gold projects in Africa, Australia, and South America The company is headquartered in Toronto, Ontario and is listed on the Toronto Stock Exchange (TSX) and the Australian Securities Exchange (ASX)The Poseidon bubble was a stock market bubble in which the price of Australian mining shares soared in late 1969, then crashed in early 1970 It was triggered by the Poseidon NL companys discovery of a promising site for nickel mining in September 1969 In the late 1960s, nickel was in high demand due to the Vietnam War, but there was aPoseidon bubble in Australia company Mining Companies list, Precious
Polyus Gold in Soviet Union company Mining Companies list, Precious
Mining company Polyus Gold in Soviet Union, Gold Mining Gold is a chemical component with the symbol Au that springs up from the Latin derivative aurum that means shining dawn and with the atomic number 79The Tropicana Gold Mine project is located 330 km northeast of Kalgoorlie, Western Australia Since 2001, it is jointly owned by AngloGold Ashanti (70% manager) and Independence Group NL (30%)Tropicana Gold Mine in South Africa company Mining Companies list
China Metallurgical Group Corporation in China company Mining
China Metallurgical Group Corporation (MCC) is a large stateowned enterprise that operates in the metals, mining, and construction industries Founded in 1983, it is one of China’s largest engineering and construction companies and is involved in a wide range of projects in China and abroad MCC is listed on the Shanghai Stock Exchange andThe Empire Zinc Company was a subsidiary of the New Jersey Zinc Company It originally held claims in the Gilman Mining district in Colorado From 1912 to 1915, the New Jersey Zinc Company acquired and consolidated the mines as the Eagle Mines and operated Empire Zinc Company as a subsidiary It also bought the town of Gilman, Colorado and Empire Zinc Company in United States company Mining Companies list
TauTona Mine in South Africa company Mining Companies list, Precious
The TauTona Mine or Western Deep No3 Shaft,is a gold mine in South Africa At some 39 kilometers 24 miles deep it is currently home to the worlds deepest mining operationsTauTona Mine is a gold mine located in South Africa It is the deepest mine in the world, reaching a depth of over 39km The mine is owned and operated by AngloGold