Rock Crystal (colorless Quartz) MCQs

 

Rock Crystal (Quartz): Interactive Gemstone MCQ Quiz

Choose one answer for each question, then select Submit Quiz. Your score and explanations will appear below. Incorrect and unanswered questions include an explanation of the correct answer.

1. What is rock crystal?

A blue variety of beryl The colorless, transparent variety of quartz A green variety of apatite A red variety of zircon

2. What composition does the book list for rock crystal?

Calcium phosphate Zirconium silicate Beryllium aluminum silicate Silicon dioxide

3. Which crystal structure is listed for rock crystal?

Trigonal Cubic Tetragonal Monoclinic

4. What hardness does the book give for rock crystal?

5 6 7 8

5. How are rock crystal crystals usually described?

Cubes with flat ends Hexagonal prisms with pyramidal ends Short tetragonal prisms with square cross sections Thin, fibrous plates

6. How does the book describe rock crystal’s cleavage and fracture?

Perfect cleavage and flat fracture Excellent cleavage in two directions Metallic fracture with no break pattern Poor cleavage and conchoidal fracture

7. Which locality does the book identify as an important source of rock crystal?

Brazil Greenland only San Benito County only Egypt only

8. What does the Greek word krystallos mean in the book’s explanation of “quartz”?

Stone Gold color Ice Light

9. What historical use of rock crystal does the book mention?

It was used only to make spectacle lenses Crystal balls were used to predict the future It was used as the principal ore of tin It was used to imitate emerald with metal foil

10. Since when does the book say synthetic rock crystal has been produced for watches?

Since 1906 Since the Middle Ages Since 1960 Since 1950