Belfast Extra Granite is a Precambrian-era fine-grained black gabbro/norite. A transparent epoxy resin filler may be used during the polishing process to cover any micro fissures or microscopic pitting, however, this has no effect on the stone's integrity and only produces a uniformly smoother surface finish. Belfast Extra Granite is frost resistant and has a consistent finish, making it appropriate for both indoor and exterior use. Prefabricated countertops, vanities, tiles, backsplashes, pavement, fireplaces, and memorials are suitable for commercial and residential construction projects.