A term applied to flattened tiny twin crystals in corundum they are developed on the basal plane.
See Alexandrite Tsarstone collectors guide, Definition of V-shaped inclusions in corundum, http://m.alexandrite.net/viewpage.html?id=GG-081-00005 (A term applied to flattened tiny twin crystals in corundum they are developed on the basal plane.) (as of Apr. 03, 2026, 15:36 GMT).