Appearance, shades and patinas
External surface:
Natural, rough, very structured, irregular with a dark grey to black colour.
Back surface:
Sawn
Edges:
Sawn if the Crust is cut to a fixed size
Rough and irregular if the Crust has not been resized

Everyday applications
Fixed size sawn crusts used for cladding or base stones are very decorative. Their dark grey to black colour and their pronounced natural contours contrast with other elements on the building facade such as the windows and metal structures.
Crusts can also be used to produce street furniture such as fountains, accesses to water features and gardens etc.