The Rockhound’s Quiz 3

  • 1. How old are the oldest known rocks on Earth?

    1. 4 billion
    2. 60 billion
    3. 1 million
    4. 5,000 years

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  • 2. Out of the thousands of minerals in the world, how many are considered gems?

    1. All of them
    2. Approximately 50
    3. A few hundred
    4. Over 1,000

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  • 3. Which mineral is commonly known as table salt?

    1. Quartz
    2. Gypsum
    3. Halite
    4. Calcite

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  • 4. Illinois’ State Mineral is also used in toothpaste. What is it?

    1. Limestone
    2. Fluorite
    3. Tully Monster
    4. Pyrite

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  • 5. Which of these stones are organic gems? (Having come from once living plants or animals)

    1. Jet
    2. Pearl
    3. Ivory
    4. All the above

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  • 6. What is molten rock below the Earth’s surface called?

    1. Magma
    2. Lava
    3. Rock
    4. Erosion

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  • 7. What is the birthstone for April?

    1. Diamond
    2. Ruby
    3. Agate
    4. Sapphire

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  • 8. This common mineral is used in electronic devices, including clocks. What is it?

    1. Calcite
    2. Quartz
    3. Corundum
    4. Apatite

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  • 9. Which rock type is formed through the cementation of smaller pieces of rock?

    1. Igneous
    2. Sedimentary
    3. Metamorphic

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  • 10. What are some characteristics for identifying minerals?

    1. Hardness
    2. Luster
    3. Crystal structure
    4. All the above

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  • 11. After lots of time, pressure, and heat, you get this kind of rock. What type of rock is this?

    1. Igneous
    2. Sedimentary
    3. Metamorphic

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  • 12. True or False: Agate is a gemstone.

    1. True
    2. False

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