This European Standard specifies methods for making technical petrographic descriptions of natural stone@ except for roofing slates. For this product@ the method for the petrographic examination is defined in EN 12326?C2. Although chemical and physical methods of analysis are required for petrographic classification of some stone types@ these methods will not be described in this standard.
PREN 12407-2016 history
2016PREN 12407-2016 Natural stone test methods - Petrographic examination