Anthracite jinis rock sedimentary kang hard lan macem-macem batu bara sing wis luster dhuwur
mangerite punika rock igneous intrusive plutonic, kang ateges monzonite hypersthene-prewangan
rock grained coarse, rock grained nggoleki, medium rock grained, rock opaque
rock grained coarse, rock grained nggoleki, medium rock grained, rock opaque