Petit Granit (also known by a variety of names including: Nero Belga, Granit de Flandre, Pierre Blue, Blue Stone, Belgian Granite, Belgian Blue Limestone, Arduin) is, despite its name, a grey-bluish limestone, rather than being a true Granite. It is mined exclusively in Belgium, where use of the name Petit Granit is subject to an Appellation d’Origine Locale (Local Appellation of Origin) designation. The stone becomes shiny black on polishing and is considered to be an easily worked and versatile dimension stone. It has also been used widely in sculpture and architecture, especially in Brussels and other Belgian cities. Petit Granit has been designated by the International Union of Geological Sciences as a Global Heritage Stone Resource.
- Pereira, Dolores; Tourneur, Francis; Bernaldez, Lorenzo; Blazquez, Garcia (June 2015). "Petit Granit: A Belgian Limestone Used in Heritage, Construction and Sculpture". Episodes. 38 (2): 85–90. Retrieved 12 November 2016.
- "Arrêté du Gouvernement wallon concernant l'attribution de l'appellation d'origine locale pierre bleue dite « petit granit d'âge géologique tournaisien". Wallex - Le droit wallon. Fédération Wallonie-Bruxelles. Retrieved 12 November 2016.
- "Cahier des charges type - Fédération de la Pierre Bleue de Belgique". Fédération des Carrières de Petit Granit. Retrieved 12 November 2016.
- "Designation of GHSR". IUGS Subcommission: Heritage Stones. Retrieved 24 February 2019.