semibright

No.39 coal is one of high-metamorphism anthracite with black color and near-metallic luster in which semibright coal and semidull coal are dominant lithetype and there is a little dull coal.

大田水井坑井田39号层属高变质无,黑色至黑色为,似金属光泽,宏岩类型以半亮型和半暗型为,为暗淡型;