Rocks and Minerals quiz
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What is pencil lead made of?
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More questions about Rocks and Minerals
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What rock are curling stones made of?
Answer: Granite
Why: The granite for Olympic curling stones comes from Ailsa Craig, an uninhabited island off Scotland.
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How many different gem materials share the name jade?
Answer: Two
Why: Jadeite and nephrite look so alike that they were only recognized as two different minerals in 1863.
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Which element makes most blue diamonds blue?
Answer: Boron
Why: Boron also lets blue diamonds conduct electricity, something other natural diamonds cannot do.
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How does mica split apart?
Answer: Into sheets
Why: The mica called muscovite is named after Muscovy, old Russia, where its clear sheets served as window panes.
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Which mineral group is most common in Earth's crust?
Answer: Feldspar
Why: Quartz is a single mineral, while feldspar is a whole family that includes orthoclase and plagioclase.
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Where in Earth is olivine the most common mineral?
Answer: Upper mantle
Why: Gem-quality olivine is sold as peridot, a yellowish-green gemstone.
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