The geological process by which coal is converted into anthracite through heat, pressure, and time.
From anthracite + -ization (Greek -izein, 'to make'). This scientific term crystallized in the 19th century as geologists studied coal formation and metamorphism.
When coal gets buried really deep and squeezed for millions of years, it transforms from soft brown coal into shiny black anthracite—this process is so extreme that it almost turns coal into diamonds!
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