Gemstone and Metal Flashcard 8

Front

What type of luster do gold, silver, and copper exhibit?

Back

Metallic luster.

Front

What is the term for when a mineral breaks unevenly, rough, or jagged?

Back

Fracture.

Front

Is the general term for a beautiful mineral prized for its hardness, color, and 'fire' a native element?

Back

False, it is called a Precious stone.

Front

What is the term for the color of a mineral in powdered form?

Back

Streak.

Front

What are ruby and sapphire forms of?

Back

False, they are forms of Corundum.

Front

What is the definition of a mineral?

Back

A naturally occurring inorganic solid with a definite chemical composition and crystalline structure.

Front

What is the difference between a precious stone and a semi-precious stone?

Back

Precious stones are rare and valuable, while semi-precious stones are more common and less expensive.

Front

What is the Mohs scale used for?

Back

To measure the hardness of minerals.

Front

What is the term for the way light interacts with the surface of a mineral?

Back

Luster.

Front

What is the primary component of diamonds?

Back

Carbon.