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Quicklime costs $120 per ton. Lime is used in large quantities as a building and engineering material. The rocks and minerals from which these materials are derived, typically limestone or chalk, are composed primarily of calcium carbonate. They may be cut, crushed or pulverized and chemically altered.
PRB spot coal prices. During the week ended January 19, 2017, PRB (Powder River Basin) spot coal prices closed at $12.40 per short ton. That was 4.0% above the previous weekâs price of $11.95 per short ton. The PRB, located in Wyoming and Montana, is the largest coal-producing region in the United States.