Not required for students of EPS2

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Light Behavior	anisotropic-biaxial
Extinction	parallel
Color/Pleochroism	colorless to pale yellow/none
Birefringence	up to third-order
Relief	high positive
Optic Sign	+ or -
Cleavage	none
2V	46-98 degree
Crystal Form	anhedral grains, zoning common
Alteration Products	serperntine
Twinning	none

Olivine in thin section