Alexandrite displays a color change dependent upon light, along with strong pleochroism.

Crystals show pleochroism from red to blue to violet.

Its color in Plane polarized light is blackish-brown, and it does not show pleochroism.

It displays strong pleochroism, the pleochroic colors being usually green, yellow and brown.

Has published important work on pleochroism in crystals and its relation to photo-dissociation.

The mineral also exhibits white to blue-tinted-white pleochroism under reflected light.

It shows low pleochroism, from gray to pink.

Due to its anisotropic nature, it has the possibility of displaying very weak pleochroism under the same conditions.

When looking at a thin section, metzeunerite is anisotropic, meaning that it has pleochroism.

In plane polarized light, suessite is a reddish-brown color that shows no pleochroism.

This is more generally referred to as pleochroism, and the technique can be used in mineralogy to identify minerals.

This property, known as "pleochroism" is of great value in the determination of rock-making minerals.

Shows strong brown pleochroism, occasionally with pleochroic halos.

Loveringite is found to be grayish white to gray in plane polarized light and does not display pleochroism.

Brookite exhibits very weak pleochroism, yellowish, reddish and orange to brown.

Marthozite shows pleochroism from yellowish brown to greenish yellow.

The mineral displays strong pleochroism and weak anisotropy.

The mineral exhibits no pleochroism and displays uneven birefringence in polarized light.

It also displays strong pleochroism.

It is hard, dense, black and usually idiomorphic, with a red-brown pleochroism in petrographic thin section.

This property is called pleochroism.

It does not display pleochroism.

In plane polarized light, uvite is colorless to pale yellow and shows weak pleochroism.

The 3T polytype, however, is not commonly pleochroic but can show green pleochroism if it is high in iron.

They may exhibit pleochroism or double refraction.