Petrographic description
Otta Pillarguri is a Sandstone quarried in Norway, catalogued in the Marmi di Carrara atlas under the international reference ICNOSA00033. Its dominant tone is grey.
Like every sandstone, it is supplied as raw blocks, gangsaw slabs in 2 and 3 cm and cut-to-size pieces made in our Carrara plants. Recommended finishes: honed, sawn, sandblasted, bush-hammered, split-face. Typical applications: exterior paving, façades, garden walls, rustic interiors.
Availability varies with the quarry campaigns: before quoting we check current stock, block sizes and the selection grade, and we send photos of the actual slabs. Price and transport are confirmed by our technical office within one working day.
Otta Slate: complete guide
Overview
Otta Slate is a dark grey-green Norwegian schistose stone, with a naturally undulating surface and micaceous glints. It is chosen for floors, roofing and cladding with a rustic Nordic character.
History and origin
It comes from Norway, where schistose stones have been used for centuries for roofs, floors and walls in traditional buildings. Commercially it is classed as slate, although geologically it belongs to the schistose rocks such as phyllites. Today it is also valued in contemporary indoor and outdoor design. Marmi di Carrara supplies it on request.
Appearance
The background is dark grey-green with silvery glints due to mica, sometimes with small rust-coloured spots or specks. The natural riven surface is undulating and irregular, and changes from slab to slab. Honed or brushed, it becomes more uniform and deeper, while retaining a slight mineral sheen.
Uses
It is suitable for indoor and outdoor floors, roofing, wall and façade cladding, stairs and bathrooms. Natural riven is excellent for non-slip outdoor areas; for kitchen worktops honed slabs are preferred.
Care and maintenance
Clean with water and neutral detergents. A specific slate impregnator protects against stains and revives the colour, particularly useful on honed surfaces.
- Classification
- schistose metamorphic rock (commercial slate)
- Density
- approx. 2,800 kg/m³ (indicative)
- Mohs hardness
- approx. 3-4
- Water absorption
- very low
- Main use
- indoor and outdoor
- Acid resistance
- good; frost-resistant
FAQ
Is Otta Pillarguri suitable for outdoor use?
Sandstone: a classic outdoor stone for paving and walls. Tell us the climate and exposure of the project and we will recommend the right finish and thickness.
What is the price of Otta Pillarguri per m²?
Indicative price from €100/m² for polished 2 cm slabs ex works Carrara, VAT excluded. The final figure depends on selection, block size, finish and quantity; a personalised quote is free.
How is Otta Pillarguri shipped from Italy?
Slabs travel in wooden A-frames inside 20-foot containers (about 25 tonnes); blocks ship loose or in open-top containers. We quote FOB, CIF or door-to-door to any port or site.
