puits (1) mur (1) temps (durée) (1) gypse (1) exploration (1) datation (1) couleur (1) chimie (1) Chemical warfare (1) Aspect (1) Dating (1) Antiquities, Prehistoric (1) Lapis lazuli (1) Technique (1) White (1) Time (1) Red (1) Raman spectroscopy (1) Plaster (1) Pigments (1) Painting (1) Oranges (1) Ocher (1) Mortar (1) Mixtures (1) Prehistoric peoples (1) Infrared spectroscopy (1) Hematite (1) Gypsum (1) Excavation (1)