Earth

What mineral makes both sapphires and rubies when cut and polished?

More Questions from Earth
Which of these is not a type of a major oil trap?
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Which is the parent rock of marble?
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What is the term for when pieces of glaciers break off and form icebergs?
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What are solids contained in the gas that issues from a volcano called?
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What permanent snowcap is within sight of the equator?
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What piece of material attracts iron and some other metals?
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From what type of storm does a hurricane form?
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Which of these continents would you find in the southern, western hemisphere?
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