Shist

Other names/varieties

Slate schist or phyllite/'ottrelite’.

Extraction area

The Ardennes region, Luxembourg province.

Mineralogical components

Mixture of primarily clay minerals, but also siliceous, ferruginous and aluminous minerals.

Maximum dimensions of raw blocks

Length 3 m; Width 2 m; Thickness 1 m

Minimum application thickness

1 cm; roofing slate 0.2 cm

Surface effects

Rough, split, sawn, honed, polished, cut (Ottré stone).

Common outdoor applications

rubble stone, corner stones, voussoirs, window frames, window sills, sills, steps, wall copings, paving, furniture, slate roofing and cladding.

Common indoor applications

worktops, tiles, decoration.