Black Basalt is a common gray to black volcanic rock; it is also called China Black, MG Black, ZP Black or Mongolia Black. It is usually fine-grained due to rapid crystallization as lava on the Earth's surface. There are different basalts. Some are soft with tiny holes.
Our new black basalt is with high density 3200kgs/m3. It is very hard and looks pure black after flamed. New Black basalt does most of finishes is flamed, which are applied to plaza paver, road curbstone, wall stone etc.