Minerals

The way in which a mineral's surface reflects light.

• Cleavage
• Fracture
• Density
• Luster

The tendency of a mineral to break along smooth, flat surfaces.

• Cleavage
• Fracture
• Hardness
• Streak

The color of a mineral's powder form.

• Streak
• Hardness
• Magnetism
• Luster

A mineral can be scratched by gypsum and quartz.

What is the hardness range?



• 1-2

• 2-7

• 2-10

• 7-10

A mineral could NOT be scratched by both calcite (3) and apatite (5).

What is the hardness range?

• 1-3

• 3-5

• 3-10

• 5-10

All minerals are __________?

• Organic

• Man-made

• Naturally occurring

• Solid, liquid or gas

All minerals are __________?

• invisible

• inorganic

• imbeciles

• illuminating

There are over 3,500 known minerals.  90% are...

• Silicates
• Nonsilicates
• Native elements
• Oxides

Minerals have a definite chemical composition.

• TRUE

• FALSE

Dull, silky, waxy, pearly, and earthy are terms that best describe which property of minerals?

• luster
• color
• streak
• cleavage