Rubellite (Tourmaline) MCQs

 

Rubellite (Tourmaline): Interactive MCQ Quiz

Choose one answer for each question, then select Submit Quiz. Your score and explanations will appear below.

1. What does the name rubellite describe in the book?

The blue variety of tourmaline
A colorless variety of quartz
The pink or red variety of tourmaline
A green variety of corundum

2. What does “rubellite” derive from, according to the book?

The Latin word for red
The Greek word for crystal
The name of a Brazilian mine
The word for blue in Russian

3. Which rubellite stones are described as the most highly prized?

Pale pink stones
Yellowish stones
Colorless stones
Ruby-red stones

4. What does the book say about the tourmaline family’s colors and crystal structure?

Each color has a completely different basic crystal structure
Members share the same basic structure but occur in many colors
All tourmalines are red
Only colorless tourmaline forms crystals

5. Which crystal features does the book describe for rubellite?

Smooth cubes with square cross-sections
Flat plates with six-sided outlines
Striations, triangular cross-section, and rounded outline
Short black rhombs with metallic faces

6. What effect may fibrous rubellite show when cut en cabochon?

A cat’s-eye effect
A six-rayed star in every stone
A colorless flash only
A metallic mirror surface

7. In what setting does the book report Russian pink and red tourmaline?

Limestone caves
Copper veins
Coal seams
Weathered granites

8. Which location is listed as another site for rubellite?

Iceland
Madagascar
Antarctica
Greenland

9. How does the book compare the specific gravity of dark-red and pink tourmaline?

Pink always has a higher specific gravity
They always have exactly the same specific gravity
Dark red has a higher specific gravity than pink
The book says specific gravity does not vary with color

10. Which set of properties matches rubellite in the book’s table?

Trigonal, complex borosilicate, hardness 7½
Trigonal, manganese carbonate, hardness 4
Hexagonal, silica, hardness 7
Cubic, aluminum oxide, hardness 9