Staurolite MCQs

 

Staurolite: Interactive MCQ Quiz

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

1. Which staurolite material is more often used in jewelry?

Transparent faceted crystals
Colorless waterworn pebbles
Opaque, cross-shaped twins
Blue fibrous masses

2. What does the book say about transparent staurolite stones?

They are rare and cut only for collectors
They are common and widely used in everyday jewelry
They occur only in synthetic form
They are always black and opaque

3. What creates the cross shape of staurolite “cross stones”?

A pattern painted on the surface
Bands of colored inclusions
A cabochon cut
Twinned crystals

4. How have staurolite cross stones traditionally been used?

As mirrors
As amulets and in religious jewelry
As industrial cutting tools
As artist’s pigment

5. Which colors does the book give for staurolite crystals?

Pink to red
Colorless to pale yellow
Reddish brown to black
Blue to violet

6. What optical property does the book note for staurolite?

Distinct pleochroism
Alexandrite-like color change only under incandescent light
A cat’s-eye effect in every crystal
Strong iridescence caused by surface tarnish

7. Which country does the book list as a staurolite locality?

Iceland
Sri Lanka
Namibia
Brazil

8. Which European locality is listed for staurolite?

Portugal
Scotland
Norway
Spain

9. What composition does the book list for staurolite?

Magnesium iron silicate
Calcium aluminum hydroxysilicate
Aluminum iron hydroxysilicate
Beryllium hydroxyborate

10. Which crystal structure and hardness does the table give for staurolite?

Orthorhombic, hardness 7
Trigonal, hardness 7½
Orthorhombic, hardness 3
Cubic, hardness 9