anthracite
Concise Oxford English Dictionary © 2008 Oxford University Press:
anthracite /ˈanθrəsʌɪt/
▶noun coal of a hard variety that contains relatively pure carbon and burns with little flame and smoke.
– derivatives
anthracitic adjective.
anthracitic adjective.
– origin C16 (denoting a gem resembling coal): from Gk anthrakitēs, from anthrax, anthrak- ‘coal’.
'anthracite' also found in these Oxford entries:

