HS Consulting  -  Petrographic Services

Prof. Dr. Helmut Schleicher

Natural Stone Investigations


petrographic analysis

natural stone provenance

building restoration

natural stone damage

petrographic examination


Identification and classification of natural stones

Evaluation of the provenance of natural stones

Denomination of natural stones according to EN 12440

To identify the place of origin of a given building stone or architectural stone is one of the most challenging tasks in petrographic investigation. Although a set of natural stones are easily recognizable by their unique composition and/or feature, the most of commercially available natural stones within a given class of rocks only hardly can be distinguished among each other. However, very careful petrographic investigations often enable the determination of the place of origin of a given stone, at least of a narrow geographic region, but often also down to a single quarry.

A prerequisite for any identification of a natural stone is the exact evaluation of its mineralogical composition and texture.