the colorless or white variety of tourmaline, often used as a gem.
Origin of achroite
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for achroite
Historical Examples of achroite
Red tourmaline is, however, sometimes called "rubellite," and white tourmaline has been called "achroite."A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public
Frank Bertram Wade