Interference Color Orders & Associated Minerals

Question 1

1st Order (Gray to Yellow)

Answer 1

• Quartz

• Feldspars (Orthoclase, Plagioclase, Microcline)

• Chlorite

• Orthopyroxene

• Sillimanite

Question 2

2nd Order (Yellow to Blue)

Answer 2

• Clinopyroxene

• Epidote

Question 3

3rd Order (Blue to Red)

Answer 3

• Hornblende

• Biotite

• Muscovite

• Olivine

Question 4

Higher Orders (4th to 6th)

Answer 4

• Dolomite

• Calcite

• Titanite