Undesirable term that means no internal flaws that is visible to the unaided eye of a diamond-clarity grader.
See Alexandrite Tsarstone collectors guide, Definition of Eye perfect, http://m.alexandrite.net/viewpage.html?id=GG-090-00004 (Undesirable term that means no internal flaws that is visible to the unaided eye of a diamond-clarity grader.) (as of Apr. 03, 2026, 15:36 GMT).