jewel on thy forehead - rather, “a ring in thy nose” (Isa 3:21).
a crown - at once the badge of a bride, and of her being made a queen, as being consort of the King; the very name Israel meaning “a prince of God.” So they are called “a kingdom of priests” (Exo 19:6; compare Rev 1:6). Though the external blessings bestowed on Israel were great, yet not these, but the internal and spiritual, form the main reference in the kingly marriage to which Israel was advanced.