The Collaborative International Dictionary
Rhaetizite
Rhaetizite \Rh[ae]"ti*zite\, n. [So called from L. Rhaetia, Raetia, the Rhetian Alps, where it is found.] (Min.) A variety of the mineral cyanite.
Wiktionary
rhaetizite
n. (context mineralogy English) A variety of the mineral kyanite.