Quartz

1
Quartz
silicateminerals

• the most basic silicate mineral SiO2
• extremely resistant to weathering

2
Feldspar group
silicateminerals

• 60 of the total weight of the crust
• aluminosilicates (Al, Si, O)

3
Mica group
silicateminerals

• occurs as thin plates or sheets
• includes muscovite (light), biotite (dark)

4
Pyroxene Amphibole
silicateminerals

• silicates of Al, Ca, Mg, Fe
• usually black to dark green

5
Olivine
silicateminerals

• silicates of Fe, Mg
• olive green color

6
Garnet
silicateminerals

• aluminosilicates of Fe, Ca, Mg, Mn
• red, brown, or yellow

7
Calcite Aragonite
nonsilicateminerals

• composition CaCO3
• main constituent of limestone marble
• important biological minerals

8
Halite
nonsilicateminerals

• composition NaCl (common table salt)
• cleaves to form cubes

9
Gypsum
nonsilicateminerals

• soft, hydrous calcium sulfate
• used in sculptures (alabaster variety)

10
Galena
nonsilicateminerals

• composition PbS (lead sulfide)
• dense, metallic, cleaves into cubes