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://w.alexandrite.com/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 Jun. 04, 2026, 07:01 GMT).