Europe:
EN 1469 : Natural Stone products – Slabs for cladding - Requirements.EN 12440 : Natural stone – Denomination criteria.
En 12407 : Natural stone test methods – Petrographic examination.
EN 12670 : Natural Stone - Terminology.
Germany:
Code of practice: DNV BTI 2.4 Wandbekleidung.Method Standard: DIN 18515.
