I remember seeing a photo of Jared and Ivanka with his rabbi of Chabad Lubavitch.
The rabbi wore the Black Cube on his forehead.
The black cube is the symbol of Saturn/Satan. There are giant black cube sculptures in major cities all over the world.
Islam's Kaaba, the black cube building in Mecca where the worshiping masses walk around and around.
Video about the Black Cube: https://www.youtube.com/watch?v=5sgzbkfY-0I