Dumortierite - UV-Vis spectra Dumortierite Index IR-Reflectance Photoluminescence UV-Vis-NIR Dumortierite: Slightly-violetish-blue dumortierite – 0.42 ct – Sahirina, Madagascar Slightly-violetish-blue dumortierite – 0.42 ct – Sahirina, Madagascar 600 nm: Fe2+-Fe3+ IVCT
