Spectrum Vis-NIR reflectance spectrum of Roussillon pigment (PIG_0173_A_607), powder with grains < 50 µm Spectrum Vis-NIR reflectance spectrum of Roussillon pigment (PIG_0173_A_601), powder with grains < 160 µm Spectrum Vis-NIR reflectance spectrum of Roussillon pigment (PIG_0173_A_606), powder with grains 100-200 µm Spectrum Vis-NIR reflectance spectrum of Roussillon pigment (PIG_0173_A_602), powder with grains > 160 µm Spectrum Vis-NIR reflectance spectrum of Roussillon pigment (PIG_0173_A_604), powder with grains 200-400 µm Spectrum Vis-NIR reflectance spectrum of Roussillon pigment (PIG_0173_A_603), powder with grains > 400µm

Spectrum Vis-NIR reflectance spectrum of Roussillon pigment (PIG_0173_A_605), powder with grains < 160 µm, d=0.75 g/cm3 Spectrum Vis-NIR reflectance spectrum of Roussillon pigment (PIG_0173_A_605), powder with grains < 160 µm, d=1.41 g/cm3 Spectrum Vis-NIR reflectance spectrum of Roussillon pigment (PIG_0173_A_605), powder with grains < 160 µm, d=1.79 g/cm3

Spectrum Vis-NIR reflectance spectrum of polished slice #1 of Roussillon pigment (PIG_0173_A_401), spot #1

Spectrum Vis-NIR reflectance spectrum of Roussillon pigment (PIG_0173_A_901, grains < 160 µm) painted on limestone block Spectrum Vis-NIR reflectance spectrum of limestone block