Wulfenite series - UV-Vis spectra Wulfenite series Index IR-Reflectance Photoluminescence UV-Vis-NIR Wulfenite: Orangish-brown wulfenite - crystal - Mexico Light-yellow wulfenite - 1.30 ct - Mfouati, Republic Of The Congo Orange wulfenite - 1.76 ct - Mfouati, Republic Of The Congo Orangish-brown wulfenite - crystal - Mexico No spectrum Light-yellow wulfenite - 1.30 ct - Mfouati, Republic Of The Congo Orange wulfenite - 1.76 ct - Mfouati, Republic Of The Congo