How To Use Trichroism In A Sentence

This colour variation is pleochroism (strictly trichroism in biaxial minerals).
This is one of the features of the stone and is due to Tanzanite's trichroism.
Most tanzanite is treated with heat to deepen the primary colors, and this subdues the trichroism slightly.
It displays a rare property called trichroism, displaying three colors sapphire blue, ruby red and amethyst purple, depending on which of its three axes you look at. In Pictures: Highlights Of Marc Weill's Mineral Collection
The cutter must orient the rough carefully, taking iolite's trichroism of blue, gray and near colorless into account.

In the more familiar blue variety, stones exhibit blue, violet and reddish orange but in fancy colors the trichroism is as follows.