Xpolars interference colors

1
Color in plane-polarized light
Strongly colored
Weakly colored
Colorless
X-polars interference colors
fluorite
fluorite
spinel
isotropic
0
garnet
Fe-rich chlorite
chlorite
apatite
K-feldspar
quartz
.010
plagioclase
ortho- pyroxene
.015
birefringence
tremolite
actinolite
hornblende
clino- pyroxene
.030
phlogopite
olivine
epidote
biotite
muscovite
zircon
.050
.100
calcite
titanite
.200
rutile
low med hi
low med hi
low med hi
relief
relief
relief
Figure 1