A type of coal that burns brightly with a clear flame and was historically used for candles and lighting.
From 'candle' coal, named for its bright flame resembling a candle. The word preserves the origin of this coal type from Scottish deposits.
Cannel coal was called 'candle coal' because it burned so cleanly and brightly—before electricity, miners prized it because burning a piece illuminated dark tunnels safely, making it worth its weight in the mining economy.
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