Earth

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

More Questions from Earth
Sudden flooding caused by heavy rain is called what?
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What is a seven-letter word meaning "movement of weathered material from gravity"?
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What piece of material attracts iron and some other metals?
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John Glenn first orbited the earth in what year?
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Where is an earthquake's epicenter?
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What is petroleum as found in the earth, before it is refined?
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Which of the following types of trees does not have lobed leaves?
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What is the study of atmospheric conditions and climate called?
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