Feb 8
2026

Xisto Negro de Foz Côa.

Name of the stone: Xisto Negro de Foz Côa

Stone type: schist (slate)

Color: dark gray, with brighter parts

Quarry location: Vila Nova de Foz Côa, Guarda, Center of Portugal

Description of the stone: A schistose laminated rock, fine-grained, dark gray colored, with irregular and deformed schistose cleavage, with alternation between lighter fine-grained beds and darker pelitic beds.

Espaço Miguel Torga. Architect: Eduardo Souto de Moura.Espaço Miguel Torga. Architect: Eduardo Souto de Moura.Peculiarities of the stone: For the Espaço Miguel Torga in São Martinho de Anta, in memory of the famous poet, Pritzker Prize winner Eduardo Souto de Moura chose the stone from nearby for the exterior walls. In the “Broot“-project on product design with materials from the country’s regions, Studio Anansi combined the polished stone with acacia wood.

Application: indoor, outdoor, countertops, decorative pieces, paving

Finishes: cleaved, sawn, split (for roofing tiles)

Certifications:

Frost resistant: Yes / No

Company: Silaco Natural Stones is a family business founded in 1990 and located in Ourém, Fátima. A pioneer in Portugal in the production and sale of decorative stones, Silaco offers a wide range of products, including slate, pebbles, gravel, rocks, and paving stones.
http://www.silaco.pt/

Contact: Rua da Escola, n.º9 – Amieira, 2435-681 Urqueira
Tel: +351 249 575 148
Mail: geral@silaco.pt

Technical Data: download “Properties“ from https://stonebyportugal.com/en/pedras/xisto-negro-de-foz-coa-2/

“Broot“ product design: Studio Anansi combined the polished schist with acacia wood.“Broot“ product design: Studio Anansi combined the polished schist with acacia wood.