The Slate (also called Lavagna stone) is a kind of soft rock or semi-hard.

The slate is easily divisible into thin slabs, flat, light, waterproof and weather resistant; it is a stone very compact, blackish leaden-coloured and easily workable. The slate tends to clear up , taking a light gray pigmentation.

Its capacity to be able to divide itself into slabs and features , makes the slate a versatile material for the construction of ceilings, external paving, steps of stairs.