Question : Which of the following is a yellowish green to green coloured gemstone often found in mafic and ultramafic igneous rocks such as basalt, gabbro, dunite, diabase and peridotite?
Option 1: Bornite
Option 2: Olivine
Option 3: Tremolite
Option 4: Garnet
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Correct Answer: Olivine
Solution : The correct option is olivine.
Olivine is a green to yellowish-green mineral commonly found in mafic and ultramafic igneous rocks, including basalt, gabbro, peridotite, and dunite. Its distinctive colour comes from its high iron content. Peridot, a gem-quality variety of olivine, is prized for its vibrant green hue and is often used in jewellery.
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Question : Which among the following rocks may also contain fossils of plants, animals and other microorganisms that once lived on them?
Option 1: Sedimentary rocks
Option 2: Extrusive igneous rocks
Option 3: Metamorphic rocks
Option 4: Intrusive igneous rocks
Question : What type of rock is granite?
Option 1: Extrusive igneous rocks
Option 2: Sedimentary rocks
Question : Which of the following is an example of Plutonic Igneous Rock?
Option 1: Basalt
Option 2: Granite
Option 3: Slate
Option 4: Dolomite
Question : When an iron nail is dipped into a coloured copper sulphate solution, its colour changes to_____.
Option 1: green, blue
Option 2: blue, green
Option 3: blue, yellow
Option 4: yellow, blue
Question : What is the most stable mineral during the process of weathering?
Option 1: Quartz
Option 3: Pyroxene
Option 4: Amphibole
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