cannel coal

from The Century Dictionary.

• noun A highly bituminous coal, very compact, and burning readily with a bright flame.

from the GNU version of the Collaborative International Dictionary of English.

• A kind of mineral coal of a black color, sufficiently hard and solid to be cut and polished. It burns readily, with a clear, yellow flame, and on this account has been used as a substitute for candles.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A kind of mineral coal of a black colour, sufficiently hard and solid to be cut and polished, and formerly burned as a substitute for candles.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a bituminous coal that burns with a luminous flame