Gold

pyrite

chalcopyrite Color

Streak• Remember the video– Two green minerals.• What color were their streaks

Luster

Look at the book on

page 47 for …

Density

If a mineral has a mass of 100 grams and a volume of 50 mL, what is its density?

Density = Mass Volume

Hardness p. 48

Hardness p. 482.5 Fingernail

2.5–3 Gold, Silver

3 Copper penny

4-4.5 Platinum

4-5 Iron

5.5 Knife blade

6-7 Glass

7+ Hardened steel file

Crystal Systems

Read in the book

(top of page 50)

Cleavage and Fracture