Hematine (ceramic barium-strontium ferrite) - UV-Vis spectra Hematine Index IR-Reflectance Photoluminescence UV-Vis-NIR Metallic black hematine (ceramic barium-strontium ferrite) - 56.45 ct - Man-made, China Metallic black hematine (ceramic barium-strontium ferrite) - 56.45 ct - Man-made, China No spectrum