Obs. a. Stone associated with coal. b. ‘A sort of cannel-coal’ (J.).
1708. J. C., Compl. Collier (1845), 11. An Out-burst or appearance of such Stone (as we call Coal-Stone).
1728. Woodward, Fossils, 17 (J.). It [Coalstone] flames easily, and burns freely: but holds and endures the Fire much longer than Coal.
