NOUN
- pleochroism of a crystal so that it exhibits three different colors when viewed from three different directions
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.
