A mysterious shining substance of uncertain identification, appearing only in Ezekiel's throne visions. Traditional interpretations include amber, electrum (gold-silver alloy), or some other brilliant metallic substance. The Greek translated it as 'elektron,' while Latin used 'electrum.' The context always involves divine appearances, where the substance describes the radiance surrounding God's presence. Its brilliance and mysterious nature fit the ineffable glory of theophanic visions. Modern interpreters remain uncertain whether it denotes a specific material or simply represents overwhelming brilliance beyond normal description.