Also known as black coal, stone coal, blind coal, Kilkenny coal, crow coal, craw coal, black diamond, hard coal
Anthracite, also known as hard coal and black coal, is a hard, compact variety of coal that has a submetallic lustre. It has the highest carbon content, the fewest impurities, and the highest energy density of all types of coal and is the highest ranking of coals.
Anthracite is a hard, shiny type of coal with the highest carbon content and lowest impurities among all coal varieties, making it the most energy-dense fuel source in its category. Because of these superior qualities, it ranks highest among coal types and was historically valued as an efficient fuel source.
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无烟煤（anthracite、希臘語：ανθρακίτης，意为“类煤”，衍生于“木炭”的希腊语άνθραξ），也稱為黑煤、硬煤（英語：black coal, hard coal），是一种坚硬、致密且高光泽的煤矿品种。在所有的煤品种中，变质作用的程度最高，具有高的熱含量和碳含量，以及最少的雜質。
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Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).