Schorl (Tourmaline) MCQs

 

Schorl (Tourmaline): Interactive MCQ Quiz

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

1. How does the book describe schorl?

The rare colorless form of quartz
The pink or red form of tourmaline
The black, iron-rich form of tourmaline
The green form of corundum

2. How common does the book say schorl is?

Very common
Extremely rare
Known from one locality only
Found only as a synthetic stone

3. What shape and appearance does the book give for schorl crystals?

Transparent, rounded crystals
Flat, colorless plates
Pink, tabular crystals
Opaque, prismatic crystals

4. How long may schorl crystals become, according to the book?

Only a few millimeters
Several yards
Exactly one inch
No more than a centimeter

5. In what geological setting does the book say schorl is found?

Pegmatites
Limestone caves
Salt beds
Coal seams

6. What was black tourmaline widely used for in Victorian-era Britain?

Engagement rings
Carving cameos for collectors
Mourning jewelry
Making mirrors

7. How does the book describe schorl’s value as a gemstone today?

It is the most valuable tourmaline
It is always more valuable than rubellite
It is valued only when colorless
It has little, if any, value as a gemstone

8. Which composition does the book list for schorl?

Iron oxide
Complex borosilicate
Calcium carbonate
Zinc carbonate

9. What hardness does the book list for schorl?

7½
3
5
9

10. How does the table describe schorl’s luster?

Metallic
Pearly
Vitreous
Resinous