Corn Starch
Transmitted Crossed Polarized Light

This is a cluster of corn starch grains viewed with crossed linear polarized light.
The cross structure evident here is characteristic of all spherulitic particles.
A spherulitic particle is one with a structure that is anisotropic and radially
symmetric. All Starches are basically spherulitic. Many monoclinic and triclinic
materials, both organic and inorganic, often grow as spherulites.