silica

89

quartz

47

chalcedony

7

silicate

4

calcite

3

garnet

2

mica

2

milky quartz

2

quartzite

2

rock crystal

2

schist

2

agate

1

amethyst

1

azurite

1

biotite

1

cassiterite

1

chert

1

copper

1

feldspar

1

galena

1

glauconite

1

iron potassium phyllosilicate

1

labradorite

1

lead sulphide

1

mica schist

1

opal

1

red quartzite

1

rose quartz

1

silicon dioxide

1