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号煤层属无烟煤,灰黑色至黑色为主,似金属光泽,宏煤岩类以半亮和半为主,少量为;