Bible Dictionaries
Coal

Holman Bible Dictionary

Charred wood used for fuel. See Cooking. The altar of sacrifice burned coals (Leviticus 16:12 ), as did the blacksmith's fire (Isaiah 44:12 ) and the baker's (Isaiah 44:19 ). Coals provided heat for refining metal (Ezekiel 24:11 ). Burning coals became a symbol of divine judgment, apparently representing God coming to earth and causing volcanoes to erupt and throw burning coals on His enemies (Psalm 18:13 ).

Bibliography Information
Butler, Trent C. Editor. Entry for 'Coal'. Holman Bible Dictionary. https://www.studylight.org/​dictionaries/​eng/​hbd/​c/coal.html. 1991.