Anthracite coal.
Another name for anthracite coal is hard coal.
Bituminous coal, or soft coal
Another name for coal is "black gold." This nickname reflects its value as a source of energy and its dark color.
Other names for coal include anthracite, bituminous coal, lignite, and thermal coal.
A lump of coal is also known as a coal nugget or coal chunk.
Another name for anthracite coal is hard coal.
Bituminous coal, or soft coal
Vein and/or Peat (depending on reference, peat is the beginning form of coal).
scuttle
Another name for coal is "black gold." This nickname reflects its value as a source of energy and its dark color.
Other names for coal include anthracite, bituminous coal, lignite, and thermal coal.
A lump of coal is also known as a coal nugget or coal chunk.
Coal. Carbonado
rhombus, quadrilateral.
Coal is a hard black rock. It begins with C.
Anthracite coal has the highest carbon content among all types of coal. It is a hard, shiny, and dense coal that is often referred to as "hard coal."
Onyx and coal are synonymous with black.