Siliceous Pierre: shale

Other titles / varieties

Slate and phyllite / "ottrelite"

Mining area

Ardenne, province of Luxembourg

Mineralogical composition

Dominant clay mineral assemblage of ferruginous, siliceous and aluminous minerals

Maximum dimensions of the raw elements

Length 3 m width 2 m thickness 1 m

Minimum thickness of application

1 cm - slate 0.2 cm

Surface States

Gross, cleaved, sawn, honed, polished, carved for the variety of Ottré

Common applications

Exterior: rubble, angle, head of mould, framing of Bay, shelf, threshold, market, covers-wall, slab, furniture, slate roofing and weatherboarding

Interior: countertop, tile, decoration