CDG Gemology & Mineralogy Fundamentals

Question 1

What is the study of minerals called?

Accepted Answer

Mineralogy

Answer

Gemology

Answer

Petrology

Answer

Crystallography

Question 2

What defines a gemstone?

Accepted Answer

Minerals or rocks prized for beauty and rarity

Answer

Only precious minerals.

Answer

Any mineral.

Answer

Artificial stones.

Question 3

Which crystal system has three unequal axes all at right angles?

Accepted Answer

Orthorhombic

Answer

Cubic

Answer

Tetragonal

Answer

Monoclinic

Question 4

What is the Mohs scale used to measure?

Accepted Answer

Hardness

Answer

Density

Answer

Color

Answer

Cleavage

Question 5

What property refers to how light bends inside a mineral?

Accepted Answer

Refraction

Answer

Reflection

Answer

Dispersion

Answer

Transparency

Question 6

Which mineral is the hardest known natural material?

Accepted Answer

Diamond

Answer

Quartz

Answer

Corundum

Answer

Topaz

Question 7

What is cleavage in minerals?

Accepted Answer

Breaking along smooth planes

Answer

How it reflects light.

Answer

Its color changes.

Answer

How it reacts with acids.

Question 8

Which mineral group do diamonds belong to?

Accepted Answer

Native elements

Answer

Silicates

Answer

Oxides

Answer

Sulfides

Question 9

What does the term 'luster' describe in minerals?

Accepted Answer

Its shine or reflection

Answer

Its color.

Answer

Its hardness.

Answer

Its transparency.