Plagioclase - UV-Vis spectra Plagioclase Index IR-Reflectance Photoluminescence UV-Vis-NIR Labradorite: Very-light-yellow labradorite – 0.85 ct – Le Puy-En-Velay, Haute Loire, France Very-light-yellow labradorite – 0.85 ct – Le Puy-En-Velay, Haute Loire, France