Green Squared Certificate – Porcelain Tile Contents Green Squared Certificate Green Squared Certificate SEE ATTACHMENT AT BOTTOM. Ceramic Tile – Porcelain: Porcelain Stone® TileRegistration # SCS-GS-02753Valid from: May 1, 2020 to April 30, 2025 Updated on January 14, 2025 Article Attachments .pdf Crossville_2020_SCS-GS-02753_s 225 KB