On major projects it is advisable to get a consultant on board early. In the selection of natural stone the following should be taken in consideration.
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Deutsches Naturstein-Archiv
The DNSA advises builders, architects, public authorities and stone working plants in the selection of stone materials.
Lga Bautechnik GMBH
The institute LGA Bautechnik GmbH has more than 30 years experience in the field of consultancy and testing of natural stone.