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  1. A native coke, occurring at the Edgehill Mines, near Richmond, VA; it is more compact than artificial coke and some varieties afford bitumen. Fay
  2. Coal altered by an igneous intrusion. Syn: cokeite
  3. Fossil coal. Tomkeieff
  4. Very brittle, black variety of bitumen, infusible and insoluble in organic solvents, containing about 85% carbon and 6% hydrogen. Tomkeieff
  5. A permissible explosive. Fay

Source: Dictionary of Mining, Mineral, and Related Terms

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