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://w.alexandrite.com/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 Jun. 02, 2026, 07:02 GMT).