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Which one of the following minerals is known as brown diamond?
  • a)
    Iron
  • b)
    Lignite
  • c)
    Mica
  • d)
    Tin
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
Which one of the following minerals is known as brown diamond?a)Ironb)...
Lignite, or brown coal, ranks last in heat and carbon content. It has been estimated that nearly half of the world’s total proven coal reserves are made up of lignite and subbituminous coal.
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Most Upvoted Answer
Which one of the following minerals is known as brown diamond?a)Ironb)...
Brown Diamond - Lignite

Introduction:
Diamonds are one of the precious materials that are widely used in jewelry making. They are also used in various industries such as cutting, polishing, and drilling. Generally, diamonds are colorless, but they can come in different colors such as yellow, blue, green, brown, and pink.

Brown Diamond:
Brown diamonds are also known as "champagne diamonds" or "cognac diamonds" due to their color. They are formed when the diamond crystal contains nitrogen impurities. The amount of nitrogen present in the crystal determines the intensity of the color.

Lignite:
Lignite is a low-grade coal that is brownish-black in color. It is formed from the compressed and heated remains of plants that lived millions of years ago. Lignite is considered to be the lowest grade of coal because it has a high moisture content and low energy density.

Why is Lignite called Brown Diamond?
Lignite is sometimes referred to as "brown diamond" due to its color and the fact that it is a carbon-based material. However, it is important to note that lignite and diamonds are not the same thing. Lignite has a completely different chemical composition and physical properties than diamonds.

Conclusion:
In conclusion, brown diamonds are a type of diamond that contain nitrogen impurities and have a brown color. Lignite is a low-grade coal that is brownish-black in color and is sometimes referred to as "brown diamond" due to its color and carbon-based composition.
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Direction: Read the case study given below and answer the questions that follow:Depending on the mode of occurrence and the nature of the ore, mining is of two types: surface and underground mining. The surface mining also known as open-cast mining is the easiest and the cheapest way of mining minerals that occur close to the surface. Overhead costs such as safety precautions and equipment are relatively low in this method. The output is both large and rapid. When the ore lies deep below the surface, underground mining method (shaft metho d) has to be used. In this method, vertical shafts have to be sunk, from where underground galleries radiate to reach the minerals. Minerals are extracted and transported to the surface through these passages. It requires specially designed lifts, drills, haulage vehicles, ventilation system for safety and efficient movement of people and material. This method is risky. Poisonous gases, fires, floods and caving in lead to fatal accidents. The developed economies are retreating from mining, processing and refining stages of production due to high labour costs, while the developing countries with large labour force and striving for higher standard of living are becoming more important. Several countries of Africa and few of south America and Asia have over fifty per cent of the earnings from minerals alone.What is the other name of surface mining?

Direction: Read the case study given below and answer the questions that follow:Depending on the mode of occurrence and the nature of the ore, mining is of two types: surface and underground mining. The surface mining also known as open-cast mining is the easiest and the cheapest way of mining minerals that occur close to the surface. Overhead costs such as safety precautions and equipment are relatively low in this method. The output is both large and rapid. When the ore lies deep below the surface, underground mining method (shaft metho d) has to be used. In this method, vertical shafts have to be sunk, from where underground galleries radiate to reach the minerals. Minerals are extracted and transported to the surface through these passages. It requires specially designed lifts, drills, haulage vehicles, ventilation system for safety and efficient movement of people and material. This method is risky. Poisonous gases, fires, floods and caving in lead to fatal accidents. The developed economies are retreating from mining, processing and refining stages of production due to high labour costs, while the developing countries with large labour force and striving for higher standard of living are becoming more important. Several countries of Africa and few of south America and Asia have over fifty per cent of the earnings from minerals alone.Which type of mining uses the method of excavating a vertical or near-vertical tunnel from the top down, where there is initially no access to the bottom?

Direction: Read the case study given below and answer the questions that follow:Depending on the mode of occurrence and the nature of the ore, mining is of two types: surface and underground mining. The surface mining also known as open-cast mining is the easiest and the cheapest way of mining minerals that occur close to the surface. Overhead costs such as safety precautions and equipment are relatively low in this method. The output is both large and rapid. When the ore lies deep below the surface, underground mining method (shaft metho d) has to be used. In this method, vertical shafts have to be sunk, from where underground galleries radiate to reach the minerals. Minerals are extracted and transported to the surface through these passages. It requires specially designed lifts, drills, haulage vehicles, ventilation system for safety and efficient movement of people and material. This method is risky. Poisonous gases, fires, floods and caving in lead to fatal accidents. The developed economies are retreating from mining, processing and refining stages of production due to high labour costs, while the developing countries with large labour force and striving for higher standard of living are becoming more important. Several countries of Africa and few of south America and Asia have over fifty per cent of the earnings from minerals alone.Why developed economies are retreating from mining, processing and refining stages of production?

Direction: Read the case study given below and answer the questions that follow:Depending on the mode of occurrence and the nature of the ore, mining is of two types: surface and underground mining. The surface mining also known as open-cast mining is the easiest and the cheapest way of mining minerals that occur close to the surface. Overhead costs such as safety precautions and equipment are relatively low in this method. The output is both large and rapid. When the ore lies deep below the surface, underground mining method (shaft metho d) has to be used. In this method, vertical shafts have to be sunk, from where underground galleries radiate to reach the minerals. Minerals are extracted and transported to the surface through these passages. It requires specially designed lifts, drills, haulage vehicles, ventilation system for safety and efficient movement of people and material. This method is risky. Poisonous gases, fires, floods and caving in lead to fatal accidents. The developed economies are retreating from mining, processing and refining stages of production due to high labour costs, while the developing countries with large labour force and striving for higher standard of living are becoming more important. Several countries of Africa and few of south America and Asia have over fifty per cent of the earnings from minerals alone.Which type of mining is cheaper, can recover more of the resource, is safer and can use larger-scale mining equipment offering higher production rates.

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Which one of the following minerals is known as brown diamond?a)Ironb)Lignitec)Micad)TinCorrect answer is option 'B'. Can you explain this answer?
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