Spectrum Vis-NIR reflectance spectrum of Beauregard pigment (PIG_0174_A_601), powder with grains < 160 µm, d=0.96 g/cm3 Spectrum Vis-NIR reflectance spectrum of Beauregard pigment (PIG_0174_A_601), powder with grains < 160 µm, d=1.22 g/cm3

Spectrum Vis-NIR reflectance spectrum of polished slice of Beauregard pigment (PIG_0174_A_401) - spot #1 Spectrum Vis-NIR reflectance spectrum of polished slice of Beauregard pigment (PIG_0174_A_401) - spot #2

Spectrum Vis-NIR reflectance spectrum of a thick layer of Beauregard pigment (PIG_0174_A_902) painted on limestone block Spectrum Vis-NIR reflectance spectrum of limestone block Spectrum Vis-NIR reflectance spectrum of a very thin layer of Beauregard pigment (PIG_0174_A_902, grains < 160 µm) painted on brown-grey limestone chip Spectrum Vis-NIR reflectance spectrum of brown-grey limestone chip