G684 black basalt, new black granite, mongolia black basal, hole basalt, asian basalt, blue stones, grey basalt, andesit, porphyry green, brown, red, fuding black basalt
G684 black basalt, new black granite, mongolia black basal, hole basalt, asian basalt, blue stones, grey basalt, andesit, porphyry green, brown, red, fuding black basalt
it is well-know basalt in Asia. most fine grains and best quality