http://popups.lib.uliege.be/3041-5527/index.php?id=704 Entrées d’index fr 0 http://popups.lib.uliege.be/3041-5527/index.php?id=703 The analysis of ochre archaeological artefacts could be realized without its destruction. The aim of this study is to identify macroscopic characteristics to distinguish on these artefacts oolitic ironstones (OIS) from different origins, in this case norman ordovician and belgian devonian ones. Despite frequent difficulties in observations, it shows that the only relevant criterion in order to determine correctly the origin of OIS lies in the form of the ooids. Other criterions, as the size or the sorting of ooids, or the colour of the cement, alone are not discriminating. The comparison of observations on several objects, both on raw materials or on polished surfaces, should enable to propose a differential diagnosis. Fri, 29 Nov 2024 14:17:18 +0100 Fri, 29 Nov 2024 14:28:46 +0100 http://popups.lib.uliege.be/3041-5527/index.php?id=703