Commonly twinned pseudohexagonal, as trillings, cyclic twin or flowers exist in some Russian alexandrite.
See Alexandrite Tsarstone collectors guide, Definition of Alexandrite twinning, http://w.alexandrite.com/viewpage.html?id=GG-086-00007 (Commonly twinned pseudohexagonal, as trillings, cyclic twin or flowers exist in some Russian alexandrite.) (as of Apr. 06, 2026, 18:42 GMT).