Module A Lesson 2: Famous Gemstones and Jewellery Diamond Encrustations British Crown Jewels Koh-I-Noor diamond: (“Mountain of Light”) One of world’s largest diamonds The Cullinan Diamond: largest diamond rough ever found Hope Diamond Deep blue colouration Lack of internal flaws Shows VS1 clarity First sold to King Louis XIV Top ten diamonds by size Diamonds >10 carats = exquisite Diamonds >50 carats = possession of museum/wealth people Diamond >199 carats = not sold
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mtm 160 grinding mill Mining is not just about blowing up parts of the mountains and usestone crushing machinery to make sand nor is it just about digging up the earth for minerals. The processes which are involved are much more complex and have so many levels. One interesting aspect experienced by the industry lately is the recycling of sand and gravel. The increasing scarcity of gravel rock and sand without disturbing the natural habitat of the world is becoming more and more worrisome for
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in industrial development. Gujarat is endowed with important resources like minerals‚ marine‚ agriculture; as also animal wealth and human resources. The state government has taken several measures to explore and exploit these resources for further processing and value addition. Information on important natural resources useful for industrial processing in the state is as under: Mineral Resources The important mineral resources in Gujarat include limestone‚ lignite‚ bauxite‚ bentonite‚ chalk
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Hornfels DEFINITION Hornfels is a very fine-grained metamorphosed shale rock‚ usually gray to black in color. Mineral composition in variable but is usually made up of some combination of equidimensional mosaic of quartz or calcite along with inequidimensional sheet silicates in random orientation or sometimes containing andalusite porphyroblasts. OCCURANCE Hornfels forms when shale rocks come into contact with a hot igneous intrusion body at lower pressures and at the equilibrium temperature
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total crust. A mineral occurs naturally‚ is a soli‚ inorganic‚ has chemical composition and a crystalline structure. Native minerals are single elements. Compounds are 2 or more. There are more compound than native. You can identify minerals by color‚ streak‚ luster‚ hardness‚ cleavage‚ and fracture. Minerals form by magma erupting and forming lava then cooling. They can also form by evaporation of water containing dissolved ions. Silicates are the most common group of minerals found in the
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mining‚ dams and their effects on forests and tribal people b. Water Resources: Use and over-utilisation of surface and ground water‚ floods‚ drought‚ conflicts over water‚ dams – benefits and problems. c. Mineral Resources: Use and exploitation‚ environmental effects of extracting and using mineral resources‚ case studies. 16 20 20 22 22 23 26 30 32 d. Food Resources: World food problems‚ Changes in landuse by agriculture and grazing‚ Effects of modern agriculture‚ Fertilizer/ pesticide problems
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PHILIPPINE MINING LAW What is mining? Mining is the extraction (removal) of minerals and metals from earth. Manganese‚ tantalum‚ cassiterite‚ copper‚ tin‚ nickel‚ bauxite (aluminum ore)‚ iron ore‚ gold‚ silver‚ and diamonds are just some examples of what is mined. Why mine? Mining is a money making business. Not only do mining companies prosper‚ but governments also make money from revenues. Workers also receive income and benefits. History of Mining in the Philippines First Mining Law:
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1. Explain the difference between a “reserve” and a “resource”. What factors influence estimates of reserves and resources for commodities such as minerals or fossil fuels? Resources and reserves are similar in that the both benefit humanity. Resources are materials that can be used to satisfy human needs‚ or used as support. Reserves on the other hand are known deposits with the ability to extract the available material economically; the size of these reserves is not always known or defined
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Pyrite is a very interesting mineral for many reasons. The name Pyrite comes from the Greek word “pyr” which means “fire‚” and was named because it was found that sparks would fly from it if struck against another minerals like steel. In early times‚ this sparking ability gave people a way of creating fire‚ and in later times‚ this ability made it popular for use in early firearms devices like the wheel lock. Today Pyrite is called “Fools Gold” because throughout history people have mistaken it for
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Barite is the most common mineral ‚ whose composition is additive barium. Produced in hot liquid mineral veins of low temperature‚ such as quartz-barite veins‚ fluorite-barite pulse and so on‚ often symbiosis with galena‚ sphalerite‚ chalcopyrite and cinnabar.Feed grizzly Barite Mining‚ always applies enhanced dressing production line‚ among which the main process is to roast the gained raw materials. The undressed ore containing barite firstly is crushed roughly and elaborately (this process normally
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