c22fc316_TIFIKASI_BATUAN___Learn_Mining__Grain_Size
[Hardness] soft [Composition] carbon [Other] black; burns with tarry smoke [Rock Type] Coal [Grain Size] 
fine
c o a r s e
m i x e d
f i n e
c o a r s e o r f i n e
TABEL IDENTIFIKASI BATUAN - Learn Mining
Grain Size