Scheelite MCQs

 

Scheelite: Interactive Gemstone MCQ Quiz

Try each question, then select Submit Quiz to see your score and explanations. If an answer is incorrect or left blank, the feedback explains the correct answer.

1. What is the composition of scheelite?

Tin oxide Calcium tungstate Calcium carbonate Iron sulfide

2. What hardness does the book give for scheelite?

3 4 5 7

3. Which crystal structure is listed for scheelite?

Tetragonal Cubic Hexagonal Triclinic

4. Which color range is described for scheelite?

Bright green to emerald green Blue to violet Red to pink Pale yellowish white to brown

5. Which optical feature does the book highlight in scheelite?

Very low dispersion and no fire High dispersion and good fire Strong fluorescence as its defining feature A metallic reflection

6. Why is scheelite faceted mainly for collectors?

It is always opaque It has no visible color It is quite soft and easily damaged It occurs only as tiny crystals

7. According to the book, what can help distinguish synthetic scheelite from diamond?

Its birefringence Its metallic luster Its perfect cleavage in every direction Its tin content

8. In which settings does the book say scheelite occurs?

Only in coral reefs Only in evaporite deposits Only in volcanic ash Pegmatites and metamorphic rocks

9. Where have very large scheelite crystals over 1 lb (0.5 kg) been collected?

England Brazil Sri Lanka Finland

10. Why are larger scheelite crystals generally not faceted?

They are too colorful to cut They have no dispersion They are not sufficiently transparent They are all synthetic