Beautiful compact basalt,
is a volcanic stone that has been used in architecture for centuries, in any
size. It’s usually grey to black and fine-grained due to rapid colling of lava at the surface of
a planet. Unweathered
basalt is black or grey. The most common uses for this rock are as aggregate in
highway construction, railroad ballast, tile, and is commonly seen as facade
material, wall cladding, and flooring. It can also be used in interior design.