It is grey to black in various tints. The rapid cooling process renders the mineral formation nearly undetectable, resulting in a fine-grained material.
A form of volcanic rock is called black basalt.
Molten lava is transformed into grey basalt by cooling
Statuario Marble
Nero Marquina
Porcelain Tile 100M2
Porcelain Tile 50M2
Porcelain Tile 600x600x10mm