Mineral ID and Formation

_?_ is determined by scratching a mineral with other minerals.

• Fracture

• Hardness

• Streak

• Color

The tendency for a mineral to split along specific planes of weakness to form, smooth flat surfaces.

• cleavage

• fracture

• crystallization

• hardness

The color of the powdered form of a mineral found by rubbing a mineral against a white tile.

• luster

• cleavage

• streak

• fracture

Diamond has a hardness of ___ on Mohs Hardness Scale.

• 1
• 5
• 8
• 10

What term refers to the regular, geometric shapes that occur in many minerals?

• fracture
• crystal
• composition
• none of the above

The tendancy for a mineral to break along curved, irregular shaped surfaces refers to?

• mineral
• luster
• hardness
• fracture

Which of the following is NOT a characteristic of a mineral?

• streak
• crystal structure
• inorganic
• chemical composition

Which of the following must be true for a substance to be considered a mineral?

• It must be organic
• It must be glassy
• It must be a gem
• It must be naturally occurring

The softest minerals is _?_

• Quartz

• Topaz

• Talc

• Amethyst

You are in California playing around in a stream when you come across a substance that appears to be gold. Which test would be the most inaccurate in determining if it is gold?

• color
• streak
• hardness
• density