Sodalite MCQs

 

Sodalite: 10 Interactive MCQs

Choose one answer for each question, then select Submit Quiz. Incorrect answers include a clear explanation based on the book.

1. What composition does the book list for sodalite?

Calcium fluoride Sodium aluminum silicate Iron sulfide Magnesium aluminum oxide

2. What hardness does the book give for sodalite?

4 6 8 5½

3. Why can sodalite and lapis lazuli be confused?

Both are always colorless Both have the same crystal shape Sodalite occurs in blue shades and is a major constituent of lapis lazuli Sodalite is made from lapis lazuli by polishing

4. What can help distinguish sodalite from lapis lazuli?

Sodalite rarely has brassy pyrite specks and has a lower specific gravity Sodalite always has more pyrite specks Sodalite is always red, while lapis lazuli is blue Sodalite has a higher specific gravity than lapis lazuli

5. What may cause white streaks in sodalite?

Pyrite Calcite Magnetite Silver oxide

6. How is sodalite usually found?

As large crystals in limestone caves Only as grains in river gravels As metallic nuggets in placer deposits As masses in igneous rocks

7. Where were rare twelve-sided sodalite crystals found, according to the book?

In the Urals in Russia In the gem gravels of Sri Lanka In the lavas of Mount Vesuvius in Italy In kimberlite in South Africa

8. Which group contains localities for sodalite listed in the book?

Brazil, Canada, India, Namibia, and the USA Spain, Mexico, Peru, Italy, and France Kenya, Tanzania, Pakistan, and Finland Norway, England, Germany, and Poland

9. Where does the book identify the most important commercial source of sodalite?

Vesuvius, Italy Madagascar The Urals, Russia Bancroft, Ontario, Canada

10. Why is sodalite from Bancroft sometimes called Princess Blue?

It was first used in a princess’s crown The deposit was discovered during a royal visit by Princess Margaret It changes color when worn by royalty It was named after a mine owner’s daughter