'Gleam' in the Bible

Now over the heads of the living beings there was something like an expanse, like the awesome gleam of crystal, spread out over their heads.

Then I looked, and behold, four wheels beside the cherubim, one wheel beside each cherub; and the appearance of the wheels was like the gleam of a Tarshish stone.

His body also was like beryl, his face had the appearance of lightning, his eyes were like flaming torches, his arms and feet like the gleam of polished bronze, and the sound of his words like the sound of a tumult.